1 . 如图,
为等边三角形,点
为
的中点,过点
作
于点
,以
为边作等边
,连接
.
(1)求证:四边形
为平行四边形;
(2)若
,求四边形
的面积.
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.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/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/18/5ad11b2d-4d18-4a1d-a317-58a0bb0bfa49.png?resizew=172)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac66de8543430fd51e7c18042e626dd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac66de8543430fd51e7c18042e626dd.png)
您最近一年使用:0次
2 . 如图,在
中,
,
,点P是边
上的动点,在边
上截取
,连接
,则
的最小值为 ___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28e4f3496bb07a304cb5438d22b5aae.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926bc0f657084d7bc2dcb5ee3fee678f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6bd86df0db8034b7f07eefca723ac2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be90637bc9f6ff016a9cc2e7ce2f83e2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/10/b0185756-60d4-4e19-a86e-4661502b6371.png?resizew=152)
您最近一年使用:0次
2023-06-07更新
|
71次组卷
|
2卷引用:广西壮族自治区南宁市2022-2023学年九年级下学期六月阶段性测试数学试题
3 . 如图(1),已知
,
,且
,将
绕C点旋转(A、C、D三点在同一直线上除外).
(1)求证:
;
(2)在
绕C点旋转的过程中,若
、
所在的直线交于点F,当点F为边
的中点时,如图2所示.求证:
(提示:利用类倍长中线方法添加辅助线);
(3)在(2)的条件下,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eaffcd2070bfcb1955e2cab66c26c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f145e6d68a0903d4d10f27cf647ddc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/d13b84bc-8d38-4826-9dcc-3f9e52cfaac1.png?resizew=482)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4db192a176978a1240d931677724694.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.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/4c38b75a1524cf5ff1d63ab23983d8ca.png)
(3)在(2)的条件下,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
您最近一年使用:0次
2023-06-06更新
|
352次组卷
|
3卷引用:广西南宁市邕宁民族中学2023-2024学年九年级上学期开学考试数学试题
名校
4 . 综合与实践
和
均为等腰三角形,
,
,
,点
、
、
在同一条直线上,连接
.
①求证:
;将下列解答过程补充完整.
证明:
,
________,
,
在
和
中,
,
,
;
②若
,则
的度数为________.
(2)类比探究:如图2,
和
均为等腰直角三角形,
,点
、
、
在同一条直线上,
为
中
边上的高,连接
.请判断
、
与
三条线段的数量关系,并说明理由.
(3)拓展延伸:在(2)的条件下,若
,
,请直接写出四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ead706ccc238d868654030a3626847c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f145e6d68a0903d4d10f27cf647ddc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f07ff13e869293de52d1314fe06892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba6f8ae133e11398981b3dfd54b7dc34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c94f0919c16e86452da239864dad6a3.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b0bf9673997ba4dd9160032f4b3b6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/736615c0d108958a028881eb2585b641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fedb246326d58aa8c14230e4fc639d4f.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3223054560c8296227763d4cbb90194.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a55a1a244f81097e05e715b69580faa.png)
(2)类比探究:如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc75953bf5dcfa4af308c34bf9952d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
(3)拓展延伸:在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60634341a9603e24b2bbc6960abe3d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eee73d637e8260733851b10b322b9cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42a876bc003f6c042c24ff4d8c11c8a8.png)
您最近一年使用:0次
2023-06-01更新
|
328次组卷
|
5卷引用:2023年广西柳州市柳南区中考二模数学试题
2023年广西柳州市柳南区中考二模数学试题广西壮族自治区南宁市青秀区天桃实验学校2022-2023学年九年级下学期5月月考数学试题2023年广西梧州市蒙山县中考数学一模模拟试题2023学年广西壮族自治区柳州地区民族高中九年级下学期5月数学模拟预测题(已下线)专题13 解三角形与三角形全等-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(全国通用)
5 . 如图,将正方形
绕着点D顺时针旋转
得到正方形
,连接
,交于点H.下列结论错误 的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f515246d9ee093bfbf9983fd47357d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c843748215172410caab837aed19ed67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/30/061e7e05-8e4e-4484-8f8e-5a9a8d3a90a1.png?resizew=169)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-05-26更新
|
111次组卷
|
2卷引用:2023年广西梧州市中考二模数学试题
2023八年级·全国·专题练习
6 . (1)问题发现:如图①,
和
均为等边三角形,点
在边
的延长线上,连接
,求证:
.
(2)类比探究:如图②,
和
均为等腰直角三角形,
,
点在边
的延长线上,连接
.
①求
的度数;
②判断线段
,
,
之间的数量关系并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.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/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
(2)类比探究:如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26813466e2ee49a493881a4384fc8748.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/4eedae8d316c76e3d0b451256de03fb9.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2db6311e228ed33b6c71d0a5918cf.png)
②判断线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/6/1b93b410-60b0-409b-b057-431605fd6bdd.png?resizew=287)
您最近一年使用:0次
2023八年级·全国·专题练习
7 . 如图,以
的边
、
为边,向外作等边
和等边
,连接
、
,相交于点
.
(1)求证:
;
(2)求证:
;
(3)求
的度数.
![](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/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/6/764f95f3-6324-4304-81ee-2b4e7f76d98a.jpg?resizew=210)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de4e483310c113045f969b058deccd28.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a1371c96162b62b4735829affef0420.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c19410c7abeae002ca97cfad4c791f.png)
您最近一年使用:0次
名校
8 . 【问题提出】
(1)如图1,在矩形
中,
,
,点E为
的中点,点P为矩形
内以
为直径的半圆上一点,则
的最小值为______;
【问题探究】
(2)如图2,在
中,
为
边上的高,且
,P为
内一点,当
时,求
的最小值;
【问题解决】
(3)如图3,滨河学校餐厅门口有一块“疯狂四季”四边形菜园
,
,
与
相交于点P,且
,过点A作直线
的垂线交直线
于点E,即
,
米.赵老师准备在
内种植当季蔬菜,边BE的中点F为菜园出入口,为了种植方便,她打算在
边上取点M,并沿
、
修两条人行走道,要求人行走道的总长度尽可能小,问
的长度是否存在最小值?若存在,求出其最小值;若不存在,请说明理由.
(1)如图1,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26ad70d2b3aac8604834d57dfc59bb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf91a833f6977fbefc242f8a8bbeef8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f998ca5d4f249d7a703cb5e1339918.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d1d99eab930cef884e01b97d4d56f1.png)
【问题解决】
(3)如图3,滨河学校餐厅门口有一块“疯狂四季”四边形菜园
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc2ada75df71c96fa3c6e4845a22726.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/66d5dd999aea55c7cab4641815fa53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48e31deb78dadacc7e128ef3eb2a054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05536e7eddf41fa151624ff5244abc56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0b6e6c4d71182e71b289e3e65ddcb06.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/27/37f20e7d-02a2-411e-91d9-8f9c96654620.png?resizew=463)
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2023-05-13更新
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408次组卷
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5卷引用:2023年广西南宁广西大学附属中学九年级5月模拟考试数学模拟预测题
名校
9 . 小贺同学在数学探究课上,用几何画板进行了如下操作:首先画一个正方形
,一条线段
,再以点A为圆心,
的长为半径,画
分别交
于点E.交
于点G.过点E,G分别作
,
的垂线交于点F,易得四边形
也是正方形,连接
.
与
的大小和位置关系:_________.
(2)【尝试证明】如图2,将正方形
绕圆心A转动,在旋转过程中,上述(1)的关系还存在吗?请说明理由.
(3)【思维拓展】如图3,若
,则
①在旋转过程中,点B,A,G三点共线时,
的值为__________;
②在旋转过程中,
的最大值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1d79a24764664a3cfab8e2a4d246ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0101a7b5c8a4aed0de2af363792e39a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.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/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad56938ea04db4e90efb3f29c1b6b41a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935ad59079c158ea0f92018fc548e4a.png)
(2)【尝试证明】如图2,将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad56938ea04db4e90efb3f29c1b6b41a.png)
(3)【思维拓展】如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881afead8f7fe2064149138221b5ed98.png)
①在旋转过程中,点B,A,G三点共线时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
②在旋转过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
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2023-05-09更新
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480次组卷
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9卷引用:2023年广西南宁市银海区三雅学校中考数学三模模拟试题
2023年广西南宁市银海区三雅学校中考数学三模模拟试题2023年广西北海市合浦县中考数学一模模拟试题2023年广西南宁市银海三雅学校中考六月模拟考试数学模拟预测题2022年河南省洛阳市中招第二次调研数学试题2023年河南省开封市河南大学附属中学中考二模数学试题(已下线)2023年河南省二模(几何综合1)2024年河南省周口市项城市第一初级中学中考第二次模拟考试数学试题2024年河南省驻马店市泌阳县中考一模数学模拟试题(已下线)重难点05 圆的综合压轴题(6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(全国通用)
10 . 如图,在给定的正方形
中,点E从点B出发,沿边
方向向终点C运动,
交
于点F,以
为邻边构造
,连接
.则
的度数的变化情况是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8689d619c2508c9000531fc1b8f1f21c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d14a97f1c1eb39916b3e0ff7ea52a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba319f477e3681e97d9401042243b2a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13a67a569b324dcd252dc5d5f9bbc0e.png)
A.一直减小 | B.一直减小后增大 | C.一直增大 | D.先增大后减小 |
您最近一年使用:0次
2023-05-08更新
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243次组卷
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4卷引用:2023年广西壮族自治区玉林市容县一模数学模拟试题