1 . 和
都是等腰直角三角形,点D是
的中点,
,点
分别在
和
的延长线上,
的延长线交
于点G,
与
交于点H.
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108fbca930d93a9027ad53e88d6d14e8.png)
(2)如图2,若点H是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d976ae465f304c3f31d6062ec923a5c.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b85860efc5644e7c3cc8284dc985ee5.png)
您最近一年使用:0次
2 . 已知,在
中,
,点M为
边上一点,连接
,将线段
绕点A按顺时针方向旋转α得到
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/06adcd4b-917c-4187-8df5-5f83ad4f7c1b.png?resizew=514)
(1)如图1,当
时,求证:
;
(2)如图2,当
,
时,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1165830b314a0dab65ea267e82bd3f6.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/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/06adcd4b-917c-4187-8df5-5f83ad4f7c1b.png?resizew=514)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b090bab2ae9637afdd7434908e0794bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10c485429b50236e146db307276e347.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392b9e1a179a6676362679354a9e7e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d03f73bec20b60bc7608972607f5a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe43993d03d9b144070e9e01d881287a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9139251b27b393fcb37577828bbf53bf.png)
您最近一年使用:0次
3 . 已知点
为
和
的公共顶点,将
绕点
顺时针旋转
,连接
.
和
均为等边三角形,则线段
与线段
的数量关系是______;
(2)类比探究:如图2所示,若
,其他条件不变,请写出线段
与线段
的数量关系,并说明理由;
(3)拓展应用:如图3所示,若
,
,
,
,当点
三点共线时,请直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/335c1d4db7d83b1271c2d6ff87a24b6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e8d80f6159c7b21b9238a0696a0da4.png)
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)类比探究:如图2所示,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c8f57eb7444878e07bf4958ecfb2ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(3)拓展应用:如图3所示,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771fdf6c640e2368b2fc37486a9eaee9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686171942bd7698035016c732db43b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/093eeec1ce84c6339c16201712e7d32b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2fb188915d2e3d7bfd633fa18221b07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
2024-02-09更新
|
71次组卷
|
2卷引用:河南省鹤壁市2023-2024学年九年级上学期1月期末数学试题
4 . 阅读与理解:
如图
是腰长不同的两个等腰直角三角形纸片叠放在一起的图形(
和
重合),其中
且
.
(1)如图
,连结
,点
是
的中点,连接
,解决下列问题:
①证明:
;
②判断
与
的数量关系和位置关系,并证明你的结论;
猜想与探索:
(2)如图
,固定
不动,与此同时将
绕点
顺时针旋转
角,其中
,即
,点
是
的中点,其他条件不变.判断
与
的关系是否不变?若不变,请说明理由;若改变,请求出相应的正确结论.
如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc75953bf5dcfa4af308c34bf9952d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597a83b8e41b7f838d3e8ccdbaa6f8f1.png)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f0bc070da203576dc94f08cf1b917ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
①证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e8a0c5f4a95fb2699860fd3f638737e.png)
②判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
猜想与探索:
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752bad4f0a3ce0b1c44eb7cdaee85a03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a59f797fe4e6e655c19ca03fc7ab7954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb7c4a22a04b61520d627e6627b069d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/4cae70b8a9d2d2e96dea62c00ced04b9.png)
您最近一年使用:0次
5 . 如图,在
中,点D在
边上,
,将线段
绕点A逆时针旋转到
的位置,使得
,连接
,交
于点F.
;
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59f9a4fe996045c2e1adb8caa06c1c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5adc18ca424552b35ab939e9d57943e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3005d7d7de6f71f44a33b92ad5a9e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90026b96116424a245b335b1adb886b.png)
您最近一年使用:0次
2024-02-08更新
|
79次组卷
|
3卷引用:广西壮族自治区南宁市2023-2024学年九年级上学期期末数学试题
6 . 如图,
中,
,在
的同侧作等边
、等边
和等边
,则四边形
面积的最大值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/87a41b92-4b38-4d1e-a06f-49bdc31743d2.png?resizew=183)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2cc5f8cec8c498aa12c99c04e1c97d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce5ac4d16b80b8760b5f7b4f52620943.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729684f958ad60b8e905fe1e1da53c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85e0aef68bb2817ab689437a5d957b13.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/87a41b92-4b38-4d1e-a06f-49bdc31743d2.png?resizew=183)
A.![]() | B.![]() | C.15 | D.![]() |
您最近一年使用:0次
7 . 如图,在矩形
中,
,
,点
在边
上,点
在边
上,且
,连接
,
,则
的最小值为 ________________ .
![](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/04ee826937d2add7a93aaa1422f8b736.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03687d97d61b4a7cecbb73f2a6604212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a2b80a47cc9632ba988c9e84e220940.png)
您最近一年使用:0次
2024-02-06更新
|
132次组卷
|
3卷引用:陕西省西安市未央区2023-2024学年九年级上学期期末数学试题
8 . 如图,在正方形
中,
,点F是
边上一点,点E是
延长线上一点,
,
.连接
、
、
,
与对角线
相交于点G,则线段
的长是( )
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c581dab991aeadf06d972e47673ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b490c01e3288ff5d22ff497d495fee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-02-05更新
|
1053次组卷
|
8卷引用:重庆市铜梁区2023-2024学年九年级上学期期末数学试题
重庆市铜梁区2023-2024学年九年级上学期期末数学试题重庆市铜梁区2023-2024学年九年级上学期期末数学试题2024年福建省部分学校教学联盟中考二模数学试题重庆市开州区开州文峰教育集团2023-2024学年九年级下学期3月月考数学试题(已下线)第05讲 正方形(3个知识点+5类热点题型讲练+习题巩固)-【帮课堂】2023-2024学年八年级数学下册同步学与练(人教版)福建省福州市平潭县平潭一中教研片2023-2024学年八年级下学期期中数学试题山西省朔州市右玉县右玉教育集团2023-2024学年八年级下学期期中数学试题辽宁省葫芦岛市连山区2023-2024学年八年级下学期期中数学试题
9 . 如图,
是
的内接三角形,
,点
在弧
上,依次连接
,若
,
,
,则
等于______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](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/e1c0582b9641c94b519cc51901cbe2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71e6ea7333dbc78d0a7b9bc3892f940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/04471b50-092b-4381-8131-7149e3b7d3c2.png?resizew=134)
您最近一年使用:0次
2024-02-05更新
|
97次组卷
|
2卷引用:江苏省泰州市兴化市2023-2024学年九年级上学期期末数学试题
解题方法
10 . 如图,
和
都是等边三角形,直线
,
交于点F.
的度数为______,线段
与
的数量关系为______.
(2)如图2,当
绕点C顺时针旋转
时,(1)中的结论是否还成立?若不成立,请说明理由:若成立,请就图2给予证明.
(3)若
,
,当
绕点C顺时针旋转一周时,请直接写出
长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b265d121f9ebc13671a5719604476a.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/36719f1e764ee0e719b65c49fae84677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b265d121f9ebc13671a5719604476a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a26de8257495e75742d3ac5de50dd2.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
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