如图,正方形
边长为
,以
为圆心,
为半径的圆弧与以
为直径的半圆
交于点
,连结
并延长交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/070efbd967784b7bb09a6176db944c29.png)
(1)求证:
为
的中点;
(2)求
的值.
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/57453c6f2806415dab410ba1b4f05cef.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/4455298339f64896b359b953d34294b8.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/6f45f2742cd04744a8e8bb95ad17f554.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/82f15f28b652475c8344ca151698aead.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/066228d43a0840e1a4d89cff04c0be44.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/477875ee3fcf4557b30a82e77722757e.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/4a77b55c5c784fd4aab7506b11c35474.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/7b95841e2cdb41ee80ed7e631a4fa4e9.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/ac61771f1a8b4e66b90926c0dc33c8a3.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/92437732da6c448da5bf61877e777755.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/070efbd967784b7bb09a6176db944c29.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/92437732da6c448da5bf61877e777755.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/ac61771f1a8b4e66b90926c0dc33c8a3.png)
(2)求
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572933430534144/1572933436997632/STEM/9c2381ceba2e4d8fa62a17436d7892d3.png)
更新时间:2016-12-04 17:24:10
|
【知识点】 几何证明选讲
相似题推荐
解答题-问答题
|
适中
(0.64)
【推荐1】选修4-1:几何证明选讲
如图,
是⊙
的直径,过点
作⊙
的切线
,
交⊙
于点
,
的延长线交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/d93fa1ac4cb34c51b3ee73fc8c657309.png)
(1)证明:
;
(2)若
,
,求
和
的长.
如图,
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/48b67942256a49e4a9c611aeee99a014.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/4d2c4dd967ff4aecb3efc65e539b47c7.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/65a3f5290337400b94f8a783d9b06265.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/4d2c4dd967ff4aecb3efc65e539b47c7.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/9580520bbccb45d99d7565313e4d7e90.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/6f5295b3ff9348778ceeed0693a21869.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/4d2c4dd967ff4aecb3efc65e539b47c7.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/89e5cf7a268842e8a632852ed6885977.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/b4097412df4f4670b23611660183780b.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/9580520bbccb45d99d7565313e4d7e90.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/a50a25bba39647df984de8c4e5b2c797.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/d93fa1ac4cb34c51b3ee73fc8c657309.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/216f0e3e055146649f0a09e55c90dcad.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/523f66e8e92e4473a9de40a5532bd55f.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/1a53ccafcf1742a08eeff7fd821677f0.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/36a474d145584000ae09edf5c9d2340f.png)
![](https://img.xkw.com/dksih/QBM/2016/8/18/1572984690147328/1572984696545280/STEM/d2f45ec565c14913a5e2864e8992b6ff.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】选修
:几何证明选讲
如图,圆内接四边形
的边
与
的延长线交于点
,点
在
的延长线上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/d3d99fbf-f96c-47fb-9ddf-9ff234c9e04b.png?resizew=231)
(1)若
,求
的值;
(2)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb420ded9d68ae6486ae8c617a3636d.png)
如图,圆内接四边形
![](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/03902478df1a55bc99703210bccab910.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/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/d3d99fbf-f96c-47fb-9ddf-9ff234c9e04b.png?resizew=231)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a82c78a08fa2345fde42401b7239d3df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/378159b1fd0a7c0dc102de5366245760.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451557ef624a9c142ebc5fa155e0e28b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f52f9f742c4074d89715a40948e8ee.png)
您最近一年使用:0次