1 . 在矩形
中,点O是对角线
,
的交点,直角
的顶点p与O重合,
,
分别与
,
边相交于E,F,连接
,
(
为常数).
(1)发现问题:如图1,若
,猜想
.
(2)类比探究:如图2,
,探究线段
,
之间的数量关系,并说明理由.
(3)拓展运用:如图3,在(2)的条件下,若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/dfa70e7c9ef8b856b494d370b7d76482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57fdde5c60611ad99eac513a724492da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/63b9b481-d458-4163-8e24-6910c709658b.png?resizew=407)
(1)发现问题:如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/296e84ad7592188c975912ba17af0ee3.png)
(2)类比探究:如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c525393775354325cbf7839366ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
(3)拓展运用:如图3,在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb6abd4e67785049f8ea82d2309f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9173b446b8ff3ec5506540f277d93a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ef25427331ab3c7190da269561a56a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
您最近一年使用:0次
2 . 综合与实践
问题情境:如图1 ,矩形
中,点M是
边上一点,
分别交
,
于点E、F.
,求
.
(2)探索研究:如图 2 ,矩形
中,
,将矩形
沿直线
折叠,E、F分别在边
上,点A落在
边上的点M 处,
,连接
,与
交于点 G .
①求
的长;
②连接
,若
,求
的长.
(3)探究拓展:如图 3 ,矩形
中,
,将矩形
沿直线
折叠,E、F分别在边
上,点A落在
边上的点 M 处,若
,求y关于x的函数关系式.
问题情境:如图1 ,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c9c9ccb1f2accde19b3ca9920a845c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c86b0118d4adeaf60493d13854fffc9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07841ed8d7ded4bd7533e1d0fae931d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d68bede67b64d902eccb204c3a4e63.png)
(2)探索研究:如图 2 ,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0931e8e80185bac33b43cc1e943bcb88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83fe060a37a93ea736e9c3d444809cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1016b76d2373c2c426a986ad6e2e9de1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1861a486d9232eeeb8afeb279f1e0bda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a675e83059001956c22462a86d903f19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
(3)探究拓展:如图 3 ,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0931e8e80185bac33b43cc1e943bcb88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83fe060a37a93ea736e9c3d444809cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/636c8fa7c66c31cb85370b19902d9d88.png)
您最近一年使用:0次
3 . 在
和
中,
,连接BD,AC,直线BD交AC于点E,交OA于点F.
(1)特例发现:如图1,若
,
.推断:
①
______; ②
的度数为______.
(2)探究证明:如图2,若
.判断
的值及
的度数,并说明理由.
(3)拓展延伸:在(2)的条件下:若
,
,
①将
绕点O顺时针旋转,使点D与点E第一次重合,如图3,此时
,求OC的长;
②在点D与点E第一次重合后,若将①重得到的
继续顺时针旋转,当点D在
内部时,如图4,线段BE的长度是否存在最大值?若存在,请直接写出最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d3c378b1118d331d30b63fc587b270.png)
(1)特例发现:如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cbad6599796efc1c177ae9349feda9.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5510b793f980a1bafa919abff54281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6282292819434a8905a212427613fd85.png)
(2)探究证明:如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e017b396ac697d90a5831f9cd4a8424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78c44f837a63101c19745cc1a79a740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6282292819434a8905a212427613fd85.png)
(3)拓展延伸:在(2)的条件下:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434845564fd5765244f8d1aa9240fa39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e03f416cb4d50a5f473df4bbceeb3094.png)
①将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8512696389a9cd69ad58ad2c5adc857.png)
②在点D与点E第一次重合后,若将①重得到的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://img.xkw.com/dksih/QBM/2022/1/12/2893008106307584/2894942011564032/STEM/b115bf00-018c-426e-81ef-7607084a0864.png?resizew=758)
您最近一年使用:0次
4 . 问题提出
如图(
),在
和
中,
,
,
,点
在
内部,直线
与
交于点
.线段
,
,
之间存在怎样的数量关系?
(
)先将问题特殊化如图(
),当点
,
重合时,易证
(
),请利用全等探究
,
,
之间的数量关系(直接写出结果,不要求写出理由);
(
)再探究一般情形如图(
),当点
,
不重合时,证明(
)中的结论仍然成立.
问题拓展
(
)如图(
),在
和
中,
,
,
(
是常数),点
在
内部,直线
与
交于点
.直接写出一个等式,表示
,
,
之间的数量关系.
如图(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe59deb5eff9123704c5505830b597e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86627ef866072f8648fb8e74d32985d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6247d0dae1512a44ce73efbc42ac47cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ac97ab0a1322c80ab2854a2788d166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91aeb28bb09f6f9ff6cf46a7d5315e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9730d8c39620a403e38171c723d3dfea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
问题拓展
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe59deb5eff9123704c5505830b597e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86627ef866072f8648fb8e74d32985d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9339c480f95573aadf80e640a41fc995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8caa9873c29d8758bd2b44b4fe48af4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1915d9711612168a69d48369acbe1a0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
您最近一年使用:0次
2024-06-06更新
|
116次组卷
|
2卷引用:2024年湖南省邵阳市邵东市中考二模数学试题
名校
5 . 综合与实践:某校数学兴趣小组利用课余时间开展平行四边形的折叠实验探究,已知点E为平行四边形
的边
上一动点,将
沿
折叠,使点D落在点F处.
,此时点F落在边
上.求证:
;
类比探究:(2)如图2,若
,此时点F落在边
上.求证:
;
拓展应用:(3)如图3,若
,此时点F落在对角线
上,且
于点E,
.求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884d06413db0b477e8aaf423467f5769.png)
类比探究:(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def38f975e46bc0f372ca7ebccf6e91d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/865dfa429e092b54439e0905962b0e6d.png)
拓展应用:(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def38f975e46bc0f372ca7ebccf6e91d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6cc3789c0e9b7d1226aa0de3327599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23d364b22221b47d0fcf19beca53b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/330918abdce072a32af4a7ce6c1e8571.png)
您最近一年使用:0次
2024-06-05更新
|
356次组卷
|
4卷引用:2024年湖南省长沙市岳麓区麓山国际实验学校中考模拟数学试题
(已下线)2024年湖南省长沙市岳麓区麓山国际实验学校中考模拟数学试题2024年湖北省襄阳市襄城区中考模拟数学试题2024年湖北省大冶市部分学校中考模拟数学考试试题2024年湖北省黄石市阳新县部分学校中考模拟数学试题
名校
6 . (1)证明推断如图1,在
中,
,
,
是
边上的高,点E是边
上一点,连接
,过点A作
的垂线,垂足为F,交
于点G.
①求证:
;
②
的值为________;
(2)类比探究如图2,在
中,
,
,
是
边上的高,点E是边
上一点,连接
,过点A作
的垂线,垂足为F,交
于点G.探究
的值(用含m的式子表示),并写出探究过程;
(3)拓展运用在(2)的条件下,连接
,当
,
平分
时,若
,求
的长.
![](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/4b10134e7a46e6f6f7cb9d5e2371727d.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9de61a33791203f203586b7ba502b051.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2db94d411e5a0785a50d9fafa2433d.png)
(2)类比探究如图2,在
![](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/62619f5ef98b1c24b10b9f66153f09d3.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2db94d411e5a0785a50d9fafa2433d.png)
(3)拓展运用在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0bf0c0c35f4eb7e234d4002c9d8164c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61601ecf8de47ed9b84ee59d65f8118.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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2023-09-20更新
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8卷引用:2023年湖南省益阳市中考数学真题变式题23-26题
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7 . 某数学兴趣小组在数学课外活动中,对多边形内两条互相垂直的线段做了如下探究:
【观察与猜想】(1)如图 1,在正方形
中,点 E、 F分别是
、
上的两点,连接
、
,
,则
的值为 ;
【类比探究】(2)如图 2 ,在矩形
中,
,点 E是
上的一点,连接
、
,且
,求
的值;
【拓展延伸】(3)如图3,在四边形
中,
,
,
,点E为
上一点,连接
,过点 C作
的垂线交
的延长线于点 G,交
的延长线于点 F,求
的值;
【观察与猜想】(1)如图 1,在正方形
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f87b02b744534ae1ed700d21fcceb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ada5e380d6b5b2066e34497e5f0baf0.png)
【类比探究】(2)如图 2 ,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1983c41ebdacc818687e43642f8fb670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/a45b04cc3e5adaeff6f9e01e29032803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8775dcf60ad143bc59a58b000f374c56.png)
【拓展延伸】(3)如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6341460754c235399e43a663404a8dba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa375c3888b332f24e7d0f9b9600c694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8a8257c3e0ee20cd4626656af4af91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ada5e380d6b5b2066e34497e5f0baf0.png)
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8 . 【问题情境】:
(1)如图1,四边形
是正方形,点
是
边上的一个动点,以
为边在
的右侧作正方形
,连接
,则
与
的数量关系是______.
【类比探究】:
(2)如图2,四边形
是矩形,
,
,点
是
边上的一个动点,以
为边在
的右侧作矩形
,且
,连接
、
.判断线段
与
有怎样的数量关系,并说明理由:
【拓展提升】:
(3)如图3,在(2)的条件下,连接
,求
的最小值.
(1)如图1,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcae34454fa43998436a8915394de0e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
【类比探究】:
(2)如图2,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13458f8259fd95e92dad787e91571a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
【拓展提升】:
(3)如图3,在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adabb437c815f64297bf0bbd184f9027.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/73d0ae28-6fcb-45a3-bbd0-94df7fa5f6d2.png?resizew=513)
您最近一年使用:0次
2023-12-28更新
|
183次组卷
|
7卷引用:湖南省衡阳市衡南县第一中学2022-2023学年九年级上学期五科联赛数学试题
解题方法
9 . 如图1,在
中,
,
,D,E分别为AB,BC边上的点,连接DE,且
,将
绕点B在平面内旋转.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/23/623d34c0-07c1-44a4-b8da-ac59ee17bed8.png?resizew=589)
(1)观察猜想:若
,将
绕点B旋转至如图2所示的位置,则
______;
(2)类比探究:若
将
绕点B旋转至如图3所示的位置,求
的值;
(3)拓展应用:若
,D为AB的中点,
,如图4,将
绕点B旋转至如图5所示位置
,请直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2cf0e95fdf1fd8a5b01d3dfd905e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e792b0ef3d542237ed0903194597651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/23/623d34c0-07c1-44a4-b8da-ac59ee17bed8.png?resizew=589)
(1)观察猜想:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b85cfaafce8f597ca12c6fa209df019a.png)
(2)类比探究:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5516b52e2c32417b3ccf507a75bf5033.png)
(3)拓展应用:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5323bb3f0568ccfc628fa2b3778b9a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b123ae31090740589ba27a846620b5.png)
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10 . 问题提出
(1)如图1,在正方形
中,E、F分别是边
和对角线
上的点,
.求证:
;
问题探究
(2)如图2,在矩形
中,
,E,F分别是边
和对角线
的点,
,
,求
的长;
拓展延伸
(3)如图3,在菱形
中,
交
的延长线于点G.E,F分别是线段
和
上的点,
,
,求
的长.
(1)如图1,在正方形
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345c91c9e67e6ee00a872078ab17f094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f2a0ee47f2bfbf68c8a1c4da23894e3.png)
问题探究
(2)如图2,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b4da8d254b7d76b7615d7f7cd824a3.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/6234f097c4a50340d86d0b9007d69eb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051b3a459c945cc6ec4a17bc0e39566f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
拓展延伸
(3)如图3,在菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfe8c741f56e946c1b454732f8faaa9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6234f097c4a50340d86d0b9007d69eb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41f3062c3f910e418d0ac2bd62303de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/2024/1/29/3421543211474944/3427181465468928/STEM/9c4072c539ce481fa6dab995d30eb73a.png?resizew=481)
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2卷引用:湖南省岳阳市弘毅新华中学2023-2024学年九年级下学期开学考试数学试题