选修4-1:几何证明选讲
如图,已知
点在
直径的延长线上,
切
于
点,
是
的平分线,交
于
点,交
于
点.
![](https://img.xkw.com/dksih/QBM/2016/8/3/1572949750628352/1572949756289024/STEM/d52e779d97bb460faada2db92d1a9f55.png)
(1)求
的度数;
(2)若
,求
.
如图,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49e763a7d8149039c8107d6bc73deec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2016/8/3/1572949750628352/1572949756289024/STEM/7d3f92b64e3b4011b73028f0938c7021.png)
![](https://img.xkw.com/dksih/QBM/2016/8/3/1572949750628352/1572949756289024/STEM/201ddb4dde114fff920f9455dc6b77a1.png)
![](https://img.xkw.com/dksih/QBM/2016/8/3/1572949750628352/1572949756289024/STEM/d52e779d97bb460faada2db92d1a9f55.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2016/8/3/1572949750628352/1572949756289024/STEM/26e2d3924ff2402a920e450db6c13f41.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/8/3/1572949750628352/1572949756289024/STEM/ccc27bbcfc7c47fc8d81a090cf758139.png)
![](https://img.xkw.com/dksih/QBM/2016/8/3/1572949750628352/1572949756289024/STEM/b51f8f7da96a485ebc98951ce82a0f6a.png)
更新时间:2016-12-04 17:57:22
|
【知识点】 几何证明选讲
相似题推荐
解答题-问答题
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较易
(0.85)
【推荐1】选修4-1:几何证明选讲
如图, 圆
是
的外接圆,
垂直平分
并交圆
于
点, 直线
与圆
相切于点
,与
的延长线交于点
.
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572943500222464/1572943505833984/STEM/1a742a0767d54b7cbd14093e4decca89.png)
(1)求
的大小;
(2)若
,求
的长.
如图, 圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cb9d8bb1b469872d3b70d1c866c947b.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572943500222464/1572943505833984/STEM/1a742a0767d54b7cbd14093e4decca89.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572943500222464/1572943505833984/STEM/c538d0049d4241ebb9bd8f6652bb5aff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】选修4-1:几何证明选讲
如图,
与圆
相切于点
,
为圆
上两点,延长
交圆
于点
,
且交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/8/24/1572989355376640/1572989361668096/STEM/a78550ab55594c369e773783426d1590.png)
(1)证明:
∽
;
(2)若
为圆
的直径,
,
,求
.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/094d11233794245d95ba79128ea3c4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/8/24/1572989355376640/1572989361668096/STEM/a78550ab55594c369e773783426d1590.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2dec12644272733ffdd9031aad1d37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/705712479f3f5d26ce080b71230984cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47acc08846fd9657acec59f221be23be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faffe3765c15f53305516895aa595a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b662e49246aba79e1536ffec3197f8c.png)
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