如图,在矩形
中,
,
,点E为射线
上一点,过点A,E,D作圆交射线
于点F,连结
,
,且
交
于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/de07437c-e27a-4671-b1b5-83de22bdba0d.png?resizew=322)
(1)求证:
;
(2)若
,求
的长;
(3)当
是以
为腰的等腰三角形时,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/de07437c-e27a-4671-b1b5-83de22bdba0d.png?resizew=322)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7326a4e6759ab196e0f69b3dc4dc202.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deaf896af5f5a09da3e50a7964d26ba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbd6f0a0412d0f43ce1f7c1d530e56e.png)
更新时间:2023-12-14 14:59:02
|
相似题推荐
解答题-证明题
|
困难
(0.15)
名校
【推荐1】已知
和
都是等腰直角三角形,
,
,
,连接
、
.
(1)如图1,若点
、
、
在同一直线上,已知
,
,求线段
的长度.
(2)如图2,当
时,过点
作
并交
的延长线于点
,
与
交于点
,求证:
.
(3)如图3,已知若
,直线
与直线
相交于点
,过点
作直线
垂直于
,点
是直线
上一点,直接写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefe4a3e7a7fa195ed6a6712447639b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4797a5f916051bf52701a9efa65663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a91778530fee017af63165397d36b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/7/aaef5aa3-f22a-4816-acec-311ac430a7a7.png?resizew=494)
(1)如图1,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/a9c3ec174b1ce835cc8737ff6ce57e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48208a3f67fd590d973badcc742d4b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86857e2e1e3f1a01dbfc32219dcef685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc7cd8d025f7622dc1eff8e04e0f6a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8946331b0a9d86e1a9c78797f3021455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8b62dc033d86ee9e561b8903796701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c911d5ab1b343bc76a295ab0295087c6.png)
(3)如图3,已知若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d527d4795ece4a5756d1cf8dba31e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3407e83df0d037d628061f7a89b6b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3407e83df0d037d628061f7a89b6b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724c0337af5dacbe09b4871a8a264064.png)
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【推荐2】【问题发现】
(1)如图1所示,
和
均为正三角形,B、D、E三点共线.猜想线段
,
之间的数量关系为 ;
;
【类比探究】
(2)如图2所示,
和
均为等腰直角三角形,
,
,
,B、D、E三点共线,线段
、
交于点F.此时,线段
,
之间的数量关系是什么?请写出证明过程并求出
的度数;
【拓展延伸】
(3)如图3所示,在
中,
,
,
,
为
的中位线,将
绕点A顺时针方向旋转,当
所在直线经过点B时,请直接写出
的长.
(1)如图1所示,
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8cfb5b3f527ff16771f6cb4741f19bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
【类比探究】
(2)如图2所示,
![](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/bd9776aa108071b50b71adf181bbdaf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d00572a90232e08932317af2a53767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.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/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6282292819434a8905a212427613fd85.png)
【拓展延伸】
(3)如图3所示,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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【推荐1】在矩形
中,
,点E是边
的中点,点P是对角线
上一动点,连接
,作点A关于直线
的对称点的
;
(1)若点P是
的中点,求
的长度.
(2)若
是以
为腰的等腰三角形,求
的长度;
(3)直线
交
于点Q,连接
,若
是直角三角形,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd1dadbfb93f5581c04a45a9ed2668b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/31/b8612b05-14ec-44c6-8260-d15d87660bd3.png?resizew=570)
(1)若点P是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099dd87a526391f830ac2a11e7d7ad56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
(3)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/968b886a9f161fdcab1e08cba8ece5d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3d566704b44ea4ef1f99c37bd46902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9837eb5ae9180b64dadfbd2fdfb9da8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
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【推荐2】如图1,在矩形
中,点P是
边上一点,
于点
,交
于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/395730aa-4fbe-4d9f-9be0-4fe9128638c0.png?resizew=418)
(1)求证:
;
(2)如图2,若
,
.
①直接写出
______
②求
的值;
(3)如图3,若
,
,直接写出
______;(用含有n的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d5ee2d6fcbcad17b69997ef0741d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/395730aa-4fbe-4d9f-9be0-4fe9128638c0.png?resizew=418)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9173097676ace550ce8cadaedf86.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17b60a7062358cdf6f94dfed792952e.png)
①直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b713ea05d6762d3989c2579ca7c3be06.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35314a30e779d4a940b9dab4d4f4b4a.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce52fd652774c7018a6628f8acbe6de1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca76ca30dbd43e01d66552a484700f50.png)
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【推荐1】如图1,已知正方形
的边长为10,点E是边
上的一个动点(点E不与点C重合),过点E与边
平行的直线交对角线
于点
,作射线
并将其绕点F顺时针旋转
,交
于点G.
(1)当
时,求
的长;
(2)当
为等腰三角形时,
的长为______;
(3)如图2,作
的外接圆,圆心为点O.当点E从(1)中的点E位置运动到点D的过程中,点O也随之运动,求点O运动路径的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/23/737a687e-7ba6-42f2-8a0a-ce1f595bd0b2.png?resizew=324)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bd9311e5295f10061deb2872fe04af5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(3)如图2,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bd9311e5295f10061deb2872fe04af5.png)
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【推荐2】如图,⊙O经过菱形ABCD的三个顶点A、C、D,且与AB相切于点A.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/a05316b8-d2ba-494b-b2d0-b64ea1b3493d.png?resizew=297)
(1)求证:BC为⊙O的切线;
(2)求∠B的度数.
(3)若⊙O半径是4,点E是弧AC上的一个动点,过点E作EM⊥OA于点M,作EN⊥OC于点N,连接MN,问:在点E从点A运动到点C的过程中,MN的大小是否发生变化?如果不变化,请求出MN的值;如果变化,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/a05316b8-d2ba-494b-b2d0-b64ea1b3493d.png?resizew=297)
(1)求证:BC为⊙O的切线;
(2)求∠B的度数.
(3)若⊙O半径是4,点E是弧AC上的一个动点,过点E作EM⊥OA于点M,作EN⊥OC于点N,连接MN,问:在点E从点A运动到点C的过程中,MN的大小是否发生变化?如果不变化,请求出MN的值;如果变化,请说明理由.
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【推荐1】如图,四边形
是
的内接四边形,
为对角线,
.
![](https://img.xkw.com/dksih/QBM/2021/4/2/2691110189342720/2698077395107840/STEM/0f32a055-eea3-4ebf-93b2-5e3024bd21fa.png)
(1)如图1,求证:
;
(2)如图2,过点O作
于点F,交
于点E,连接
并延长交
于点P,求证:
;
(3)如图3,在(2)的条件下,过点C作
交
于点G,连接
交
于点H,若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5cf47aa0b806434697025623f7e6985.png)
![](https://img.xkw.com/dksih/QBM/2021/4/2/2691110189342720/2698077395107840/STEM/0f32a055-eea3-4ebf-93b2-5e3024bd21fa.png)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5489aaa6dc00789fcf126bf2fd744a02.png)
(2)如图2,过点O作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008eed073588d66685710546cc6f2f1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b22554cb4eedb4d7e53c830a5c3639.png)
(3)如图3,在(2)的条件下,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62db4573cfe4b6f0d4123bafbd518749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/416a72b34fd0515ed591e83cda45b358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e50ffaba29591d84ffa294bb817acae.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐2】已知正方形
,
经过点
,
,且与
边相切于点
,连接
.
(1)如图
,求证:
;
(2)如图
,连接
,点
是圆
上一点
平分
,过点
作
交
的延长线于点
.
①求证:
是
的切线;
②若正方形
的边长为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed45e4d4c844946148c3f12c19fe4a5.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a9c559e3a27d359d5bb51810aa6cf5.png)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d00572a90232e08932317af2a53767.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30c86a9f6d0c1f9d316218aa8a7180c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7699dd30e08702bfc6499eb9c89e54a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed45e4d4c844946148c3f12c19fe4a5.png)
②若正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12e50c17021e4811dd1aaf34f7eb718.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/313628e5-44fb-4fcb-84ff-d935b01916b4.png?resizew=269)
您最近一年使用:0次