如图,
为圆
的直径,
为垂直于
的一条弦,垂足为
,弦
与
交于点
.
![](https://img.xkw.com/dksih/QBM/2013/9/24/1571361404723200/1571361410768896/STEM/8f03828972c54f96b8e9e99ff3c371ab.png)
(Ⅰ)证明:
四点共圆;
(Ⅱ)证明:
.
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2013/9/24/1571361404723200/1571361410768896/STEM/8f03828972c54f96b8e9e99ff3c371ab.png)
(Ⅰ)证明:
![](https://img.xkw.com/dksih/QBM/2013/9/24/1571361404723200/1571361410768896/STEM/3c087dde6e9740d8a94521c04f77491c.png)
(Ⅱ)证明:
![](https://img.xkw.com/dksih/QBM/2013/9/24/1571361404723200/1571361410768896/STEM/aaf4a4bcdc984eb68bed6c589d6ad12c.png)
12-13高三·河北唐山·开学考试 查看更多[1]
(已下线)2014届河北唐山市高三年级摸底考试理科数学试卷
更新时间:2016-12-02 12:05:53
|
【知识点】 几何证明选讲
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】如图,在
中,
,以
为直径的圆
交
于
,过点
作圆
的切线交
于
,
交圆
于点
.
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/ec3af90fd7ba4d99917e9d79013e16b0.png)
(Ⅰ)证明:
是
的中点;
(Ⅱ)证明:
.
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/1c3243612767430198a8fe9f3aca1bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f7aeb95ea266415c6c83901b28a76f.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/a2aa09ad88ac4c12b07850617d156642.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/7f41b29e39664b3e96069d22ade6bbf4.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/26cbc60b5fd04def8572f5c867e1b757.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/c10cb87e1e22405a9a9a973efb9711b2.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/c10cb87e1e22405a9a9a973efb9711b2.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/7f41b29e39664b3e96069d22ade6bbf4.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/f20f5332b8504ab4988eba058018297f.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/ebcb4f8053354a1a8f6d01cb010e7e8c.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/261509790cf244db88bf340387d665a3.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/7f41b29e39664b3e96069d22ade6bbf4.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/8fb880ab7b7e435a9d66f3b75ae44748.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/ec3af90fd7ba4d99917e9d79013e16b0.png)
(Ⅰ)证明:
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/ebcb4f8053354a1a8f6d01cb010e7e8c.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572941800357888/1572941805985792/STEM/f20f5332b8504ab4988eba058018297f.png)
(Ⅱ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2506556e578b73eddbe0032f3d4dec66.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】选修4-1:几何证明选讲
如图,直线
与直径为4的圆
交于
两点,且
,直线
切圆
于点
.
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572944464273408/1572944470859776/STEM/dbd9a8da005542edb6fba48949c0d25a.png)
(1)证明:
;
(2)若
,延长
交
于点
,求证:
.
如图,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2899e607479d8d1c47d954ae9ebb7144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/2016/7/27/1572944464273408/1572944470859776/STEM/dbd9a8da005542edb6fba48949c0d25a.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a109c829d652632a88ade6924fcda206.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d36d529ae753d360c14b243c1ef7992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18addf44c31c2dc0e4905b365e4801a0.png)
您最近一年使用:0次