(1)如图1,在
中,
分别交
,
于点D,E.若
,求
的值;
(2)如图2,在
中,
的顶点D,E分别在边
,
上,顶点F,G在边
上.若
,
,
的面积分别为3,6,4,求
的值;
(3)如图3,D是等边三角形
的
边上一点,直线
分别与边
、
交于点E,F,交
于点P,且
.若
,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105068b25f5a63af32f4082cfe08691e.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/f5b8c6a6a3c5be5ea11ab90fa835f864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af614752bd8c370f34199c8635893496.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0308e8470a42a9f114b0a4f53841a290.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d11746005a0e806f2d27f89e3d9e9c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c163a189c44fd9e9234bedd4dd96625c.png)
(3)如图3,D是等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1faac00d60bbfa7bffee6eeb03825b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b30155e0e3cf7c5146d3311e5b8da93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2abe5da7ee1a2ff3ca5dec7a2d04dc.png)
2024·湖北武汉·一模 查看更多[3]
2024年湖北省武汉市部分学校中考一模数学试题2024年湖北省武汉市中考模拟数学试题(三)(已下线)热点05 三角形(10大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(广东专用)
更新时间:2024-03-22 00:21:05
|
相似题推荐
解答题-计算题
|
较难
(0.4)
【推荐1】问题提出:
(1)如图①,在
中,
,
,
,则
的面积为______;
(2)如图②,在四边形ABCD中,
,
,
,
,点M,N分别为边CB,CD上两动点,且
,连接AM,AN,试说明四边形AMCN的面积是定值;
问题解决:
(3)如图③是一块平行四边形空地,其中
,
,
,点M,N分别为边CB,CD上两点,且
,连接AM,MN,AN.公司规划在
区域修建一座购物商城,在
区域修建一个顾客休息中心,在
区修建小吃城,最后中间
区域进行绿化.公司为了利益最大化,绿化面积即
的面积尽可能小.请你计算出绿化面积的最小值和CM的长度.
(1)如图①,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图②,在四边形ABCD中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85fb581e6a89ae40731b8619fff1e173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ddd49625097d0a78df7170be4f882e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ed0c20ed7142bf8ed780864660f4562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1936b8f07c6ac07855181115bc6f073c.png)
问题解决:
(3)如图③是一块平行四边形空地,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041cb52f2491fc4d3cb32063d0e116b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8df3ca5cf10137e5c123d37c214aa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8416024905bcddfd726de5629763778c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20d576d3824eaf583c67809124c6327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/19/f551f969-3d05-4e37-a1f4-6604473f544f.png?resizew=555)
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解答题-问答题
|
较难
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【推荐2】如图,在矩形
中,
,点
从点
出发向点
运动,运动到点
停止,同时,点
从点
出发向点
运动,运动到点
即停止,点
的速度都是每秒1个单位,连接
.设点
运动的时间为
秒
为何值时,四边形
是矩形;
(2)当
时,判断四边形
的形状,并说明理由;
(3)当
为何值时,
;
(4)整个运动当中,直接写出线段
扫过的面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631b5a76fbe4e117bd1005beb99b76e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e235c33bdfc7335f75e00f9a463cf297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe83f1ae7e5f05d8bed6bf6f42db0e7d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56bb615b68fdd6edfe77c246e81702a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9af2350fad62b04e28e710045b513c.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aad564239fcfe92cfba8fb6ba758af5.png)
(4)整个运动当中,直接写出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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解答题-证明题
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【推荐1】如图1,两个等腰直角三角形△ABC、△EDC的顶点C重合,其中∠ABC=∠EDC=90°,连接AE,取AE中点F,连接BF,DF.小红想分析当△EDC绕着点C旋转时,图形的基本元素之间有什么不变的关系.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/6ca88578-042e-4f61-bd35-bc0b8e2ccab7.png?resizew=475)
(1)如图1,当B、C、D三个点共线时,请猜测线段BF、FD的数量关系,并直接写出;
(2)将△EDC绕着点C顺时针旋转一定角度至图2位置,小红根据“AE中点F”这个条件,想到取AC与EC的中点M、N,分别与点F相连,再连接BM,DN,最终利用△BMF≌△FND(SAS)证明了(1)中的结论仍然成立.请你思考当△EDC绕着点C继续顺时针旋转至图3位置时,(1)中的结论是否仍然成立?若成立,请证明你的结论;若不成立,请说明理由;
(3)连接BD,在△EDC绕点C旋转一周的过程中,△BFD的面积也随之变化.若AB=3,DE=2,请直接写出△BFD面积的最大值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/6ca88578-042e-4f61-bd35-bc0b8e2ccab7.png?resizew=475)
(1)如图1,当B、C、D三个点共线时,请猜测线段BF、FD的数量关系,并直接写出;
(2)将△EDC绕着点C顺时针旋转一定角度至图2位置,小红根据“AE中点F”这个条件,想到取AC与EC的中点M、N,分别与点F相连,再连接BM,DN,最终利用△BMF≌△FND(SAS)证明了(1)中的结论仍然成立.请你思考当△EDC绕着点C继续顺时针旋转至图3位置时,(1)中的结论是否仍然成立?若成立,请证明你的结论;若不成立,请说明理由;
(3)连接BD,在△EDC绕点C旋转一周的过程中,△BFD的面积也随之变化.若AB=3,DE=2,请直接写出△BFD面积的最大值.
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解答题-证明题
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较难
(0.4)
【推荐2】已知:在
中,
,
,
,
交线段
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/7d13a4af-eae1-41f3-9ed8-4d4382a44829.png?resizew=494)
(1)如图1,当
时,求证:
;
(2)当
时,
①如图2,猜想线段
、
之间的数量关系并证明你的猜想;
②如图3,点F是
边的中点,连接
,
与
交于G,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61aae2a7084f4f93e752ed97b3faef96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7777a27259d26724229b604df42656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78002bca853929365a3f58082f3e7637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/7d13a4af-eae1-41f3-9ed8-4d4382a44829.png?resizew=494)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb5a2fb856430b29a6369ec01df97472.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
①如图2,猜想线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
②如图3,点F是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8028bcfe76de87e3ef33ec10990c95.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐3】如图1.在
中,D、E分别为
的中点,连接
:
(1)请结合操作1或操作2的方法所得出的结论,我们可以得到三角形中位线定理,
.
【结论应用】
(2)如图2,四边形
中,对角线
相交于点O,四条边上的中点分别为E、F、G、H、依次连接
,得到四边形
.
为平行四边形;
②当
与
满足 时,四边形
是矩形,当
与
满足 时,四边形
是菱形.
③若
,
,
,求四边形
的面积.
【问题解决】
(3)如图3所示,在一个四边形
的草坪上修一条小路,其中点P和点Q分别为边
和边
的中点,且
,
,
,求小路
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
操作1.将![]() ![]() ![]() 操作2.延长 ![]() ![]() ![]() 试探究 ![]() ![]() |
.
【结论应用】
(2)如图2,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882b9b8fbc7bd82819a2223df1882a21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b74e2b6dae540571fdd509c4e966b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2020a8429f161b32300c5b7ab36f8c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
【问题解决】
(3)如图3所示,在一个四边形
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0f1e09abab770b21fac00007485d9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】已知:如图,AB⊥BD,CD⊥BD,垂足分别为B、D,AD和BC相交于点E,EF⊥BD,垂足为F,我们可以证明
成立(不要求考生证明).
若将图中的垂线改为斜交,如图,AB
CD,AD,BC相交于点E,过点E作EF
AB交BD于点F,则:
(1)
还成立吗?如果成立,请给出证明;如果不成立,请说明理由;
(2)请找出S△ABD,S△BED和S△BDC间的关系式,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15c82abd98b00d976da8ba75155fe31.png)
若将图中的垂线改为斜交,如图,AB
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15c82abd98b00d976da8ba75155fe31.png)
(2)请找出S△ABD,S△BED和S△BDC间的关系式,并给出证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/127bc815-1149-409c-86e1-f37cf78de85a.png?resizew=444)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,在平行四边形
中,
,
,
,
,
,
为对角线
上的两点(点
与
、
、
都不重合),
,
于点
,
于点
,连结
,
.
是平行四边形;
(2)四边形
能否成为矩形?四边形
能否成为菱形﹖请直接写出答案;
(3)连结
,作点
关于
的对称点
,若点
落在边
上,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae8221601c7bd5c51fd520615581fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27e47690ed332c573186992b6d25654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9da34cf9e12ae21e20af861a581ca0fe.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa9ef3ee8838c3e3f5ecdfd0c093418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bdadcc147a7e441decf7561c9e7310e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a270ec7e23fc0cc1d4b04bf1d22184.png)
(2)四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a270ec7e23fc0cc1d4b04bf1d22184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a270ec7e23fc0cc1d4b04bf1d22184.png)
(3)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图1,
中,
,
于点H,点D在
上,且
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/5c177d9c-7957-4b0f-95e0-dfcc0a71ff6c.png?resizew=418)
(1)求证:
;
(2)将
绕点H旋转,得到
(点B,D分别与点E,F对应),连接
.
①如图2,当点F落在
上时(F不与C重合),若
,
,求
的长;
②如图3,当
是由
绕点H逆时针旋转
得到时,设射线
与
相交于点G,连接
,试探究线段
与
之间满足的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4744b427f036dfbc6db68c87cd5c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701e06c87bb438d85ab1de43cae9ccc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/5c177d9c-7957-4b0f-95e0-dfcc0a71ff6c.png?resizew=418)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01476dfb5970e27f54f742c27b9515f9.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a40032e6e70341ca7139d9c97c2a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd35bd406de97d29594aff377b213fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
①如图2,当点F落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3362a45b72536c714c5107b0ae94f1c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c0490a98008b88a5312bfbdd87d7fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
②如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd35bd406de97d29594aff377b213fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a40032e6e70341ca7139d9c97c2a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】在
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/8/2897121950515200/2960182632652800/STEM/d42f1efc-07c2-4286-8bdd-cb30505c184a.png?resizew=533)
(1)如图1,点
为
上一点,
交
边于点
,若
,求
及
的长;
(2)如图2,折叠
,使点
落在
边上的点
处,折痕分别交
、
于点
、
,且
.
①求证:四边形
是菱形;
②求菱形的边长;
(3)在(1)(2)的条件下,线段
上是否存在点
,使得
?若存在,求出
的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://img.xkw.com/dksih/QBM/2022/1/8/2897121950515200/2960182632652800/STEM/d42f1efc-07c2-4286-8bdd-cb30505c184a.png?resizew=533)
(1)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.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/1d112fd6b1726cb8da92c660573b7356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)如图2,折叠
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c66d7b36f3265e396a3fd23fef2493fa.png)
①求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b91e01ce5c194151433bc5cdb61897.png)
②求菱形的边长;
(3)在(1)(2)的条件下,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa0cf3890d6f1c4fe1bde0190e3be18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】如图,直线y=-x+4与x轴交于A点,与y轴交于B点,动点P从A点出发,以每秒2个单位的速度沿AO方向向点O匀速运动,点E是点B以Q为对称中心的对称点,同时动点Q从B点出发,以每秒1个单位的速度沿BA方向向点A匀速运动,当一个点停止运动,另一个点也随之停止运动,连结PQ,设P,Q两点运动时间为t秒(0<t≤2).
![](https://img.xkw.com/dksih/QBM/2019/10/7/2306942980358144/2307347291250688/STEM/67ba63bfca054fc1ae56193405931a02.png?resizew=185)
(1)直接写出A,B两点的坐标.
(2)当t为何值时,PQ∥OB?
(3)四边形PQBO面积能否是△ABO面积的
;若能,求出此时t的值;若不能,请说明理由;
(4)当t为何值时,△APE为直角三角形?(直接写出结果)
![](https://img.xkw.com/dksih/QBM/2019/10/7/2306942980358144/2307347291250688/STEM/67ba63bfca054fc1ae56193405931a02.png?resizew=185)
(1)直接写出A,B两点的坐标.
(2)当t为何值时,PQ∥OB?
(3)四边形PQBO面积能否是△ABO面积的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(4)当t为何值时,△APE为直角三角形?(直接写出结果)
您最近一年使用:0次