1 . 如图1,
中,
,点
分别在边
上,
,将
绕点A逆时针旋转
,直线
相交于点P.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/717af683-b3d3-4b14-8ed4-b51911b9623a.png?resizew=411)
(1)若
,将
绕点A逆时针旋转至如图2所示的位置,则线段
与
的数量关系是 ,位置关系是 ;
(2)若
,将
绕点A逆时针旋转.
①(1)中的结论是否仍然成立?若成立,请仅就图3所示的情况加以证明;否则,请写出正确结论,并说明理由.
②若
,E是
的中点,当以
为顶点的四边形是矩形时,请直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4300aefd67369742e2b1ddcdc02dd495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4506359deff2607a13d5203457c71b19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/746513524deb2446b70089e08d39f6ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d021981c03e75b1a246d899dcc64656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefe4a3e7a7fa195ed6a6712447639b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da791242f6c8f3ba8fca6633fe5bc3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a03841966d8142fa4a4aed023e37931.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/717af683-b3d3-4b14-8ed4-b51911b9623a.png?resizew=411)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c5624abe6455b6d3eaa8d1cffcc6e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefe4a3e7a7fa195ed6a6712447639b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e853863d4da6b10d69ba5a8893c6f8d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefe4a3e7a7fa195ed6a6712447639b7.png)
①(1)中的结论是否仍然成立?若成立,请仅就图3所示的情况加以证明;否则,请写出正确结论,并说明理由.
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd0c00f62c22e90e7d542a2f8dd83d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a5a10dd7d8dea96813ef34582d7fa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
您最近一年使用:0次
名校
2 . 如图,在平行四边形
中,点G,H分别是
,
的中点,点E、F在对角线
上,且
.
是平行四边形;
(2)连接
交
于点O,若
,
,求
的长.
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1522a9c3b2466395570c2689a4055584.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a821f40394893f52ed3dda0f29cd1744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afb5e71726d0a4a358ff9f6e31696c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
您最近一年使用:0次
2024-02-15更新
|
851次组卷
|
13卷引用:四川省成都市锦江区锦江区嘉祥外国语学校2023-2024学年九年级上学期期末数学试题
四川省成都市锦江区锦江区嘉祥外国语学校2023-2024学年九年级上学期期末数学试题四川省成都市锦江区嘉祥外国语学校2023-2024学年九年级上学期期末数学试题2023年湖北省武汉市江夏第一中学初中部八年级下学期3月月考数学试卷广西壮族自治区梧州市蒙山县2022-2023学年八年级下学期期中数学试题(已下线)第03讲 平行四边形的性质和判定(知识解读+达标检测)-2023-2024学年八年级数学下册《知识解读·题型专练》(苏科版)(已下线)专题18.29 平行四边形(分层练习)(提升练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(人教版)(已下线)第02讲 平行四边形的判定(2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)(已下线)专题05 平行四边形的性质及判定(八大题型)-【好题汇编】备战2023-2024学年八年级数学下学期期中真题分类汇编(山东专用)(已下线)专题03平行四边形全章高频考点(考点清单,1个定理 1个性质4个图形的性质与判定4个技巧2种思想专练)原卷版(已下线)专题09平行四边形的判定(六大题型)-【好题汇编】备战2023-2024学年八年级数学下学期期中真题分类汇编(人教版,湖北专用)(已下线)专题04 平行四边形与菱形(考点清单+20种题型解读)-2023-2024学年八年级数学下学期期中考点大串讲(苏科版)内蒙古自治区包头市第三十五中学2023-2024学年八年级下学期期中数学试题(已下线)专题03平行四边形全章复习攻略(1个定理1个性质4个图形的性质与判定4个技巧2种思想专练)-2023-2024学年八年级数学下学期期末考点大串讲(人教版)
3 . 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
4 . 完成下列各题
![](https://img.xkw.com/dksih/QBM/2024/1/18/3413812548968448/3416012660441088/STEM/d765a364ea0e4bb5b74d505669f7509e.png?resizew=369)
(1)问题的提出:如图1,
中,
,求证:
.
(2)知识的运用:如图2,四边形
是正方形,
,
,点
是边
上一点,
,且
,连
.求
的度数.
(3)拓展与延伸:如图3,四边形
中,
,
,
,
为四边形
边
上一点,连
,若
,且
,探究
与
的数量关系.直接写出结果,不需说明理由.
![](https://img.xkw.com/dksih/QBM/2024/1/18/3413812548968448/3416012660441088/STEM/d765a364ea0e4bb5b74d505669f7509e.png?resizew=369)
(1)问题的提出:如图1,
![](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/e4354365ca0929f8a606ed0bf341e4ca.png)
(2)知识的运用:如图2,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd3c2130c900b186ae36406ae496b78b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d47dfff00b8d24a52cbc4799d764c006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7521601ac1fbc4a52d4fe44be9c8e88c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03b70c662d45c1b741ea5ed7a31007cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb3748300134501953d6b1c3a905026.png)
(3)拓展与延伸:如图3,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd3c2130c900b186ae36406ae496b78b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3767efa8adfb71001ad39df9560cbf6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b7fb103d8cff32e2ec506e088d6a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300d3ec6447250bb25915ae86873929a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
5 . 如图,等边三角形
中,
,
、
分别是边
、
上的动点,且
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5a781deb1272b7fa99ceabfb6d8c23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57615a30dfc998665afe109743af8347.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/4ed2c8d7-5233-422e-82a9-4928dd778094.png?resizew=156)
您最近一年使用:0次
6 . (1)【问题情景】如图1,已知在正方形
中,点E、F分别是边
、
上的一动点,连接
、
,且
,如图,延长
至G,使
,通过证明
和
可得
,即:
.
(2)【尝试探究】如图2,当点E、F分别在射线
、
上运动,
时,探究
、
、
之间的数量关系,请说明理由;
(3)【模型建立】如图3,若将直角三角形
沿斜边翻折得到
,且
,点E、F分别在边
、
上运动,且
,试猜想(1)中的结论还成立吗?请加以说明;
(4)【拓展应用】如图4,已知
是边长为5的等边三角形,点D是
外一点,连接
、
,且
,
,以D为顶点作一个
角,使其角的两边分别交边
、
于点E、F,连接
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e9f8f8598ffafaf6168f64799c8b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa75e795d4f39357e5807a63b248bb14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4d2d2babe63c166f0e1e9b11e65452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83e9f698052b80f6d75c8abdd5262ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b24dfa37067ff455888ebe076eeb1fb2.png)
(2)【尝试探究】如图2,当点E、F分别在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a679040c4d556723e482bacbab41356d.png)
(3)【模型建立】如图3,若将直角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59281d3136f2c67c078d98842171224d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a6aef04eceb608a7a2cfc3e566f9e8b.png)
(4)【拓展应用】如图4,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcfac9ab1dc776c9ec076ab2a132fcd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
您最近一年使用:0次
2024-01-29更新
|
166次组卷
|
2卷引用:四川省达州市2023-2024学年九年级上学期期末数学试题
7 . 如图,在菱形
中,点
是
上一点,连接
并延长分别交
和
的延长线于点
和点
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/28/1175362b-24f5-4c72-9251-773462f19ddc.png?resizew=156)
(1)求证:
;
(2)连接
,若
,且
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/28/1175362b-24f5-4c72-9251-773462f19ddc.png?resizew=156)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288e6d2fd4d8ce870f9c770f3619908c.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed46a014ece6a0830c7c8b8deb2c56e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff7ba0385cda327f43ad12eba24ef30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3fa59bbd016ba85cd38499697434c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
8 . 如图,在正方形
中,
,
是对角线
上两点,
,将
绕点
顺时针旋转
后得到
,连接
.求证:
.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15febfda66e733f14aa7115ed4343a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97ea2797b9c70066de243acdc7fe9f8.png)
您最近一年使用:0次
2024-01-24更新
|
44次组卷
|
2卷引用:四川省广安市武胜县2023-2024学年九年级上学期期末数学试题
9 . 把两个等腰直角三角形和
按图①所示的位置摆放,将
绕点C逆时针旋转
(
)到图②所示位置,连接
,
.
(1)特例问题:如图①,
![](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/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
(2)探索解决:如图②,(1)中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
(3)拓展应用:如图③,点D在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae39c7e44a8cdf1fce02ce64ae148f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
您最近一年使用:0次
10 . 如图,在正方形
中,
、
是
和
上的动点,连接
,
,交
于
,
两点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/d08c037f-a66e-4139-9fc4-d0a07e81d6f8.png?resizew=280)
(1)当
时,①求
的度数;
②求以
为边的正方形面积.
(2)当
、
在
,
上运动时,始终保持
,连接
,则
面积的最小值为____.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.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/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.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/9a9fa8832f98b5418a7d75892f7951b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/d08c037f-a66e-4139-9fc4-d0a07e81d6f8.png?resizew=280)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb1f6c9e8b610d029a20ebab0b2dd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08699ec7bcd102d6fb7531527cac082a.png)
②求以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15bdee7807edba89958c84bf4bb85f15.png)
(2)当
![](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/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70eb88a80bf37601f08ed4bdba4a834c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de3a8deac36e5cdc2d67a0142b5326fb.png)
您最近一年使用:0次