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/2016/9/26/1573040539918336/1573040546463744/STEM/47971440866b4a2d9aa8673b8c23c188.png)
(1)证明:
;
(2)若
,延长
交
于点
,求证:
.
![](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/2016/9/26/1573040539918336/1573040546463744/STEM/47971440866b4a2d9aa8673b8c23c188.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)
更新时间:2016-12-04 21:02:05
|
【知识点】 几何证明选讲
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
中,以
为直径的⊙
分别交
于点
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/1f4837a3-d7b6-4964-a229-b678a8d2b26f.png?resizew=170)
求证:(Ⅰ)过
点平行于
的直线是⊙
的切线;
(Ⅱ)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/5881068127a39caf319492b4177204f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30a68ece6676997a0af9ad7b6f5c7410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/1f4837a3-d7b6-4964-a229-b678a8d2b26f.png?resizew=170)
求证:(Ⅰ)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(Ⅱ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d004bacb4f1fd4280d1d79f72fffe4.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】选修4-1:几何证明选讲
中,
,
,
,
,点
在
上,且
.
求证:(I)
;
(II)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4830a5e6437787c7cfc05f8b5c3ad7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/726e55b51fbba6a4d65b2ef305750bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f7e4aaec667383d41992d61ac45cff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f16a3e24129c3c60041fbae7a29aa728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7777c101fe0c68fead2fa510b81775c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2391c0e2fc44598610d519dacb778062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588a2119bc5e8cdf4731828b195a7892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8381272d47b9806ce3fc3640ab3c93.png)
求证:(I)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59337828423f5286e023498fafee2548.png)
(II)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3366e2a15a3675c7dff26d147d43bd83.png)
您最近一年使用:0次