1 . 【问题提出】
(1)如图①,点
,
分别在
,
上,
,
,
,
,
.则
的长为______;
【问题探究】
(2)如图②,在
中,
,点
是边
上一点,过点
作
的垂线交
于点
.若
,
,
,求
的长;
【问题解决】
(3)如图③,逸夫中学拟在校园西南角的一块四边形
区域修建植物园,对角线
将整个四边形分成面积相等的两部分,已知
米,四边形
的面积为
平方米,计划在
,
边上分别确定点
,
,在
边上确定点
,
,使四边形
为矩形.在矩形
内种植各种花卉和树木,在四边形
剩余区域种植草坪.为了方便师生观赏,计划在
之间修一条小路,根据设计要求,想让小路
尽可能短.求小路
长度的最小值及这时
,
两点之间的距离.
(1)如图①,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1165830b314a0dab65ea267e82bd3f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4cb4069a2e1e90d1a9c4979ad09ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a968aa24530e2f7b461e8ca954a5cfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/912097bd29caec0bbb3504c614aedea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d527d4795ece4a5756d1cf8dba31e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c86fd411fb6d75d67230a206e074c8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f34b9f9ca963a3cb502354191e00ec17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
【问题探究】
(2)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241465bb8b380fc37d46763241c92e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b719ba1831aebb82346752cd2cafce57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57bc8d35e0fe0735fc85ed11d7931580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3c84ea83f5595d23dfa367e016485e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
【问题解决】
(3)如图③,逸夫中学拟在校园西南角的一块四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1003c2b33b7c62519e8e2c59b19ffd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bcb9f575bce3957d094b72a8e721443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1003c2b33b7c62519e8e2c59b19ffd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46ce9e13eeaeef4177ee1bf4475ccc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48b10f6ec508dc77b2fd461c6952cde3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48b10f6ec508dc77b2fd461c6952cde3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1003c2b33b7c62519e8e2c59b19ffd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e93ad6b96441fae19ed2c713aae98a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e93ad6b96441fae19ed2c713aae98a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e93ad6b96441fae19ed2c713aae98a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
2 . 【问题提出】
(1)如图1,在
中,点D、E分别在
、
上,连接
,且
,若
,
,则
的长为_______;
【问题探究】
(2)如图2,在
和
中,点B、C、D在同一条直线上,
,
,判断
与
的数量关系,并说明理由;
【问题解决】
(3)如图3,五边形
是某植物园的平面图,C、D分别是植物园的入口和出口(可看作点),
和
是进出植物园的两条主路,该植物园为举行春季花展,现要在出入口C、D之间进行花墙装饰工作.已知
,
,
,
,
,求装饰的花墙
的长度.(结果保留根号)
(1)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d6ceed6e5a36193bcb5a557853dbee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2176dac04a8b410e319342fb8e895b1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
【问题探究】
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772c9fa3f9a5b29a710b989e80d658e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
【问题解决】
(3)如图3,五边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfcad059579cb16faaf3ff78a548adb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac7036aa06c1d8c224f4a90647d4d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d68ed01cac3a30c9321376d5190230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98150a9618ec3035863b94039f0943c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccec6da41572b7e5b4cb0cc1a34fe5f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
3 . 问题提出
(1)如图①,
和
均为等腰直角三角形,且
,连接
、
,则
的值为______;
问题探究
(2)如图②,四边形
是边长为4的正方形,点
是
上一动点,以
为斜边在
边的右侧作等腰
,
,连接
、
当
最小时求
的面积;
问题解决
(3)随着社会的发展,农业观光园走进我们的生活.某农业观光园的平面示意图如图③所示的四边形
,其中
,
,
,
.为了能够让广大游客更近距离观光,徜徉在大自然的海洋,设计师计划在
之间修一条观光小路,为了方便市民观赏,想让
最大.根据设计要求,求出当
的最大时
的面积.
(1)如图①,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed3bcb1d5b5cf32aa1d85c8a0ff5be30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274ae3f70122c99addb6df12405bac91.png)
问题探究
(2)如图②,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f767e7ff79a0fbfcf97244fd95bb9f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114a5ad325caa9a344eb5dd198413859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217d37ca5469a57cb7417a2ac0d58efe.png)
问题解决
(3)随着社会的发展,农业观光园走进我们的生活.某农业观光园的平面示意图如图③所示的四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6696972e89d5617c99c914bc00f1c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/695525d00319665b1ad0d01717979523.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/07dba3b1-f617-4b15-82a9-d509479bbfd6.png?resizew=443)
您最近一年使用:0次
4 . 问题探究
(1)请在图1中过点A画一条直线,将
分成面积相等的两部分;
(2)如图2,在
中,
,
,点E在
的延长线上,且
,过点E作直线l分别交边
,
于点M,N.若直线l将
的面积平分,则请求出
的长度;
问题解决
(3)某市为保护生态环境,方便市民观光游览,准备在秦岭北麓兴建一处“和谐观光园”,其形状为四边形
,如图3所示.在四边形
中,
,实际长度
公里,
公里,
公里,
公里,点P在
上且
公里,根据用地需求,需在
上确定点E,将五边形
作为特色植物繁育展示区,使其面积为四边形
总面积的一半,并在
上确定点F,在
中修建游客休息区,剩余部分作为花卉展示区,为方便游客游览,要求修建
、
、
三条观光道路的总长度最小.请问这样的
是否存在?若存在,请求出点E到点B的距离及
周长的最小值;若不存在,请说明理由.
(1)请在图1中过点A画一条直线,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
问题解决
(3)某市为保护生态环境,方便市民观光游览,准备在秦岭北麓兴建一处“和谐观光园”,其形状为四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59281d3136f2c67c078d98842171224d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df049f15adb6667113ceee3a6638cd0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafd21730b3a22d6b078eeb1a18bc468.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682c9d9b6ad1bc45ddbd6dd01060207b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c95e812db3db543e8874a4287ea321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/e7f527d6-4042-4ce9-9aef-a9c5fcb690bd.png?resizew=514)
您最近一年使用:0次
5 . 【计算与推理】
(1)如图1,
,
与
交于点
,
为
的中点,
,
,则
的长为_______;
和一块小三角板
,其中
,按如图2所示位置放置,使两个三角板的
角的顶点
重合.连接
、
,当
绕点
顺时针旋转时,试判断
,
的值是否变化?如果不变,请求出
,
的值,如果变化,请说明是如何变化并加以证明:
(3)现有一块足够大的木板,为参加学校科技节比赛,小明想在这块木板上裁出一个等边三角形(
)部件做模型,他的操作如下:
第一步:用两块大小不一的含
角的直角三角板
和
按如图3所示位置放置,其中
,含有
角的顶点
重合,分别延长
交于点
,连接
,得到
;
第二步:取
的中点
,分别连接
,
,得到
.
请问,按上述操作,裁得的
部件是否符合要求?请说明理由.
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0d3e0ae605bd0e18af759747676cafc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56512504254ab7f574a717dd6830fb33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6541c0cb89f08aa4c937c0beb915e0a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca9b29cf78d7cbe030ca2c1fe5923cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13b121a371524ec93dec325c5b0fe69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(3)现有一块足够大的木板,为参加学校科技节比赛,小明想在这块木板上裁出一个等边三角形(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
第一步:用两块大小不一的含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13b121a371524ec93dec325c5b0fe69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e2ac799536f7b41b9b60834933c9e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13b121a371524ec93dec325c5b0fe69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b194d0da4190a51a7aa4b6391f511cc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7f9f7952c4be18cb73393047c2ad75.png)
第二步:取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520976477250a5321f61d11947c3116f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
请问,按上述操作,裁得的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
您最近一年使用:0次
6 . (1)问题探究:如图①,在
中,
,
,
,点D是
的中点,点E是斜边
上的任意一点,连接
,请求出
的最小值.
(2)问题解决:图②是某公园的一个五边形人工湖
,已知
,
米,
米,
米,F为
中点,为更好地提升市民的观景体验,决定在湖中央修建一个半径为7.5米的观景台,并在人工湖上修建四条栈道
(宽度忽略不计),若修建栈道的造价为5000元/米,为节省资金,请问应如何设计使得修建栈道的费用最低,并求出最低费用.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0763b031b7e6b6d87ce3554ac482d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990e5c2836cdaa7ee5e0bf650429279c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3b28b2c71658e936d7bca6dd2d3bdaa.png)
(2)问题解决:图②是某公园的一个五边形人工湖
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78cbe6451d174d74d80e7f648858aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee2dac77daebb25f50647abc3249200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccff8efc786d7524e8d09c94385c7127.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b697b4b6230d62b428fce3c27571ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54398e27b0a537336fc475ba46264624.png)
您最近一年使用:0次
7 . 折纸是我国传统的民间艺术,幸运星、纸飞机、千纸鹤、密信等折纸活动在生活中都广为流传,通过折纸我们既可以得到许多美丽的图形,同时折纸的过程还蕴含着丰富的数学知识,下面就让我们带着数学的眼光来探究一下有关纸片的折叠问题.
,将纸片沿线段AB折叠(如图②).如果长方形纸片
,
,求重叠部分
的面积;
(2)折纸2:如图③,已知矩形纸片
,点E为边
上一点,将
沿着直线
折叠,使点C的对应点F落在边
上.小明想要在边
上找出点E,他的作法如下:
i)以点B为圆心,以
长为半径画弧,交
于点F;
ii)作
的平分线与
交于点E.
请问若按上述作法,所得的点E是否符合要求?请证明你的结论;
(3)折线3:如图④,在等腰
中,
,
.动点M,N分别在两腰
上(M不与A,B重合,N不与A,C重合),且
.将
沿
所在的直线折叠,使点A的对应点为P.设
的长为x,
与等腰
重叠部分的面积为y.
①求y与x之间的函数关系式;
②试求
与等腰
重叠部分的面积的最大值,并求出此时
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df3b2901ad26337818f75e81448ebb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da2b024e5926973d8e69d466b9c0e94a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)折纸2:如图③,已知矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
i)以点B为圆心,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
ii)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e99c17d72c203b50802f19d4731545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
请问若按上述作法,所得的点E是否符合要求?请证明你的结论;
(3)折线3:如图④,在等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0bbc68f2a65aea126b6e0d2c1081037.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c1dc52a8ba9f389800eb92dbd145bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①求y与x之间的函数关系式;
②试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
8 . 【问题提出】
(1) 如图①, 在
中, 点
为
的中点, 则:
(填“
,
,
”)
【问题探究】
(2)如图②,在正方形
中,
, 点E为
的中点,点F、G分别为
、
边上的动点,
,求
面积的最小值;
【问题解决】
(3) 如图③,矩形
是某农业观光园的部分平面示意图,
千米,
千米,
边上的点E为休息区, 且
千米, 三条观光小路
、
、
(小路宽度不计, F在
边上, G在
边上)拟将这个园区分成四个区域,用来种植不同的蔬菜,根据实际需要,
并且要求△EFG的面积尽可能小,那么是否存在满足条件的
?若存在,请求出
的面积的最小值;若不存在,请说明理由.
(1) 如图①, 在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf8953048692736e7bfa5aaac24f49b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43cf12a775e422da0eeb7b2aff568e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
【问题探究】
(2)如图②,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12ab2158dfaeffc00d5eb79471619f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
【问题解决】
(3) 如图③,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26d451d3fd83f2336d421c32ecaadfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6a4caf95978172f3e586052dcd32f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc832ac10c407e12e59f434799f5fff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e6ef4354cf6337fad1b719ff2bf8b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
您最近一年使用:0次
9 . (1)问题提出:如图①,在矩形
中,
,
,
是
上一动点,则
的最小值为_________
(2)问题探究:如图②,在正方形
中,
,点
是平面上一点,且
,连接
,在
上方作正方形
,求
的最大值.
(3)问题解决:为迎接2021年9月在西安举办的第14届全运会,打造体育历史文化名城,某小区对一正方形区域
进行设计改造,方使大家锻炼运动.如图③,在正方形内设计等腰直角
为健身运动区域,直角顶点E设计在草坪区域扇形
的弧
上.设计铺设
和
这两条不同造价鹅卵石路,已知
米,
米,
,
,若铺设
路段造价为每米200元,铺设
路段的造价为每米100元,请求出铺设
和
两条路段的总费用的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3318260948820af44fcfb598da6fb73d.png)
(2)问题探究:如图②,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348fb71fbc47fd87e9ce011652ef4186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/922b1e3f3948b044ff8f53af2aa1f038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
(3)问题解决:为迎接2021年9月在西安举办的第14届全运会,打造体育历史文化名城,某小区对一正方形区域
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/babea91663e479b0018ebac5e36374d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd4997da49b3dfe98144ad13aed0d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7612afc3724b3cf381556994bc1821f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33f381b03270154695d6b5421b1e739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c0d6068866683547b733dbe005031a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/21/3635a6bd-bfab-4f1e-830c-e27d32c18771.png?resizew=582)
您最近一年使用:0次
2023-10-18更新
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84次组卷
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2卷引用:陕西省西安市高新第二中学2023-2024学年九年级上学期第一次月考数学试题
10 . 【初步感知】
(1)如图①,在
中,点
为
上一点,连接
并延长交
的延长线于点
,若
,求证:点
是
的中点;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/59a9fce6-c84b-4d74-9bbe-9834cd59a503.png?resizew=206)
【探究运用】
(2)如图②,在四边形
中,
,
,
,
,点
是
的中点,且
,
、
的延长线相交于点
,求证四边形
是菱形,并求
的长;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/3db4efed-1aa9-4fcc-87af-eb29b0f0ab0a.png?resizew=153)
【实际运用】
(3)如图③,某小区内有一块三角形区域
,在
边的中点
处修建一个公共卫生间,在
边上确定一点
,使得
,修两条笔直的小路
和
,在其交汇处
修一凉亭(凉亭大小忽略不计),已知凉亭到
处的距离为200米(即
米),求凉亭到
处的距离
.
(1)如图①,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e7cee4031f638f6fdb03f93e685572a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/59a9fce6-c84b-4d74-9bbe-9834cd59a503.png?resizew=206)
【探究运用】
(2)如图②,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b937442ad4cc480adc11bb143559454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211c130e20ea36d96e88927f88df956e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/3db4efed-1aa9-4fcc-87af-eb29b0f0ab0a.png?resizew=153)
【实际运用】
(3)如图③,某小区内有一块三角形区域
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2bb81f4812ca2308483e34c1bc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b99c8273154bff8cf73358fee3956f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/e9521672-a857-487f-aa6f-29ca7d812c02.png?resizew=161)
您最近一年使用:0次
2024-01-27更新
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75次组卷
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2卷引用:陕西省咸阳市武功县2023-2024学年九年级上学期期末数学试题