如图所示,在等腰梯形
中,
,对角线
与
交于
,点
分别是
的中点.求证:
是等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2deeeceafa44ff745fd28b1fbe918fd5.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/18c5970b2d21e88c5ed4fb53584e62f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ab3671a59305d409003138f4d7b8983.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f248ba5ffa1df121dc0b037f51e3a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c7d7169ecf9b68fbe9244ceba6724e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/d223e30b-5637-48e6-b039-270105f3bbf8.png?resizew=127)
更新时间:2022-08-28 20:11:48
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在正方形
中,
分别是边
上的点,
,
,连接
并延长交
的延长线于点
.
(1)求证:
;
(2)若正方形的边长为4,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a887678ca42faa3d289e2b6460790b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a3ae16e3f4a6b8994eb716f8502ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d030b3dac667c00da2e2b88b8af9ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/16/28509742-3930-461a-924a-5a9cf969b54a.png?resizew=212)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f84d22bff850ead07a39d681aee77f.png)
(2)若正方形的边长为4,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
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解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,
中,
,以点
为圆心,
为半径作⊙
,
为⊙
上一点,连接
、
,
,
平分
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/d24efe0f-8b76-4c77-af87-9d52513d6c9a.png?resizew=115)
(1)求证:
是⊙
的切线;
(2)延长
、
相交于点
,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/9d78abbad68bbbf12af10cd40ef4c353.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/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/d24efe0f-8b76-4c77-af87-9d52513d6c9a.png?resizew=115)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)延长
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d99b8d609d3301b1362890ed8bbd2fe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0b732912cec85d7818ba891cdf82ed.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,锐角
中,
为边
中点,
内切圆与边
切一点
的内切圆与边
切于点
,若四边形
为平行四边形,求证:
在
的平分线上.
![](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/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cbc944ca5f456dc6ece9fa58a7bbb6f.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/25ae006f399a4b83fb384de288c860b0.png)
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您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,设
为
中的定弦. 在
两侧的弧上分别任取点
和点
.
、
的延长线交于点
,
、
的延长线交于点
,
的平分线与
交于点
,
的平分线与
交于点
. 求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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