选修4-1:几何证明选讲
如图,圆
的弦
,
交于点
,且
为弧
的中点,点
在弧
上,若
,求
的度数.
如图,圆
![](https://img.xkw.com/dksih/QBM/2017/5/6/1681346041446400/1681863787274240/STEM/d46d298355c243d3a7a8412f453f83f7.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2017/5/6/1681346041446400/1681863787274240/STEM/3a0e79dafd1b4f8e8146fe621ca33d5e.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2017/5/6/1681346041446400/1681863787274240/STEM/c0c88cf8b5c548b6b11ecbd6d1daced3.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2017/5/6/1681346041446400/1681863787274240/STEM/5b4a94ef9d75436b80316a5a553a7b1f.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2017/5/6/1681346041446400/1681863787274240/STEM/fbf70c5e154245a0906278a54c3d6b44.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2017/5/6/1681346041446400/1681863787274240/STEM/c0c88cf8b5c548b6b11ecbd6d1daced3.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2017/5/6/1681346041446400/1681863787274240/STEM/ea407b4ac3a34eecad587167d3772764.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2017/5/6/1681346041446400/1681863787274240/STEM/1f53cdfb3c254e8bb7a04a31219f7119.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2017/5/6/1681346041446400/1681863787274240/STEM/1627ef95ace442d180c71fd3df456954.png?resizew=117)
![](https://img.xkw.com/dksih/QBM/2017/5/6/1681346041446400/1681863787274240/STEM/b4ce5d0d5fbc4afc9a8eaa749b9ab14f.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2017/5/6/1681346041446400/1681863787274240/STEM/d1790d35121b4e42a7a055a727b34aa8.png?resizew=162)
更新时间:2017-05-15 18:13:39
|
【知识点】 几何证明选讲
相似题推荐
解答题-证明题
|
适中
(0.64)
【推荐1】选修4-1:几何证明选讲
已知线段
为圆
的直径,
为圆周上一点,
于
,过
作圆
的切线交
的延长线于
,过
作
垂直
的延长线于
,求证:
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572855368957952/1572855375372288/STEM/dc52e086a95a41c59d55972d94ede4db.png)
(1)
;
(2)
.
已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17be90850a55d8b037e15d45de2bab0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572855368957952/1572855375372288/STEM/dc52e086a95a41c59d55972d94ede4db.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb1b2dbd754b0f8de472b260c576f064.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.64)
【推荐2】选修4-1:几何证明选讲
已知四边形
为圆
的内接四边形,且
,其对角线
与
相交于点
,过点
作圆
的切线交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573096153595904/1573096159936512/STEM/29d386117f8345aa8f34561ae58d54b9.png)
(1)求证:
;
(2)若
,求证:
.
已知四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2016/10/26/1573096153595904/1573096159936512/STEM/29d386117f8345aa8f34561ae58d54b9.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773aa712639a27d0670e57b970f57fab.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5295ea3130e7248d1a11d8500b081721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
您最近一年使用:0次