如图,已知圆
是
的外接圆,
是
边上的高,
是圆
的直径.
![](https://img.xkw.com/dksih/QBM/2017/11/21/1822048528678912/1823292782215168/STEM/1f4e76b5f4194a3f8016675a3896e26a.png?resizew=167)
(1)求证:
;
(2)过点
作圆
的切线交
的延长线于点
,若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e47d64e7cd6c3179394120d007ff12a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2017/11/21/1822048528678912/1823292782215168/STEM/1f4e76b5f4194a3f8016675a3896e26a.png?resizew=167)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed8f57d66aae0f646879f7b41bf0343.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d0da7b2fff904812954936c341960a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
17-18高三上·福建福州·期中 查看更多[2]
更新时间:2017-11-23 10:41:34
|
【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】如图,正方形
边长为2,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/2016/4/7/1572576988127232/1572576994263040/STEM/f591b42ee42541c59c3f07786a34ff48.png)
(I)求证:
;
(II)求
的值.
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572576988127232/1572576994263040/STEM/2e79a027b4a94d1299b63537892b3f4d.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572576988127232/1572576994263040/STEM/aca90e00b0a64a91af711c3e86bdc3de.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572576988127232/1572576994263040/STEM/45e3a48259674e57a1da435667167eac.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572576988127232/1572576994263040/STEM/059c41febad64d9ea15a4a8b4cf3c6d1.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572576988127232/1572576994263040/STEM/ff33dad683e3445ab7fa7d81b79cf26b.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572576988127232/1572576994263040/STEM/da25b8370b484929a225460f3e2084b2.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572576988127232/1572576994263040/STEM/e024b87164a24e40ae4dc13d60f11c10.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572576988127232/1572576994263040/STEM/06be9bee2729467fbd8dae4837140241.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572576988127232/1572576994263040/STEM/1addb7cdeeaf4c27bcc0e8a71f47cf05.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572576988127232/1572576994263040/STEM/f591b42ee42541c59c3f07786a34ff48.png)
(I)求证:
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572576988127232/1572576994263040/STEM/684c6b482f46495db1018127a65992ab.png)
(II)求
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572576988127232/1572576994263040/STEM/59be922e546c4fc3adcba5454f8c2fc9.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】A.选修4-1:几何证明选讲
如图,直线
切圆
于点
,直线
交圆
于
,
两点,
于点
,且
,求证:
.
如图,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/f90c780dac29ff8b7df5881d3b33abab.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c1cefd13974fa13997ac7d0e0764b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce45219c1c0c50d8dfcd8d156009652f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd9b15bac196c815a17887311a67fdf.png)
![](https://img.xkw.com/dksih/QBM/2017/5/12/1685474831319040/1685618495709184/STEM/fddb63a930474836b9170d450f7670a8.png?resizew=153)
您最近一年使用:0次