1 . 如图,AB为⊙O的直径,BD是⊙O的切线,连接AD交⊙O于E,若BD∥CE,AB交CE于M,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4b0311cb57d78f465a57dc7f26353c.png)
![](https://img.xkw.com/dksih/QBM/2018/12/5/2090404214185984/2094345211813888/STEM/647c1bdc-8188-4995-bad2-424c20db0e6d.png)
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12-13高三上·辽宁本溪·期末
2 . 如图,D,E分别是AB,AC边上的点,且不与顶点重合,已知
,
为方程
的两根,
(1) 证明
四点共圆;
(2) 若
,求
四点所在圆的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b662797f6678e2475f4631563694e37a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea77ba313fcc751481ac1ca214df3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ed516191ef7d1805cd7cf945232d79.png)
(1) 证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b226772d996dafd09c37b5bad17d54fd.png)
(2) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f402d5cb7a7d2ea738391f39a00897.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b226772d996dafd09c37b5bad17d54fd.png)
![](https://img.xkw.com/dksih/QBM/2012/2/15/1570738702614528/1570738707406848/STEM/bd53a0f954f849d9b5e078e4efc9698f.png?resizew=150)
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11-12高三上·山东聊城·阶段练习
3 . 如图,
是内接于
,
,直线
切
于点
,弦
,
与
相交于点
.
(I) 求证:
≌
;
(Ⅱ)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3947b65d110d74021faf8156b2f4d709.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
(I) 求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3814287dbb60d478bffc5366f9928b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f8f01137e92c0f2e63467036ae9cce.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19592a5eaacb7752f792d43652b43db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/2011/12/25/1570632677564416/1570632682971136/STEM/8d453e2dd3474110b2e9f240122c8547.png?resizew=141)
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2010高三·全国·专题练习
真题
4 . 如图,△ABC的角平分线AD的延长线交它的外接圆于点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e28ce60503fab70ce1797449d90dadc.png)
(Ⅰ)证明:△ABE∽△ADC;
(Ⅱ)若△ABC的面积
,求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e28ce60503fab70ce1797449d90dadc.png)
(Ⅰ)证明:△ABE∽△ADC;
(Ⅱ)若△ABC的面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec4fccf16c3064c1fe33098ec3e8ae2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://img.xkw.com/dksih/QBM/2011/2/25/1570012428500992/1570012433973248/STEM/a38682262ddd43fea44e49fb2f7163c1.png?resizew=152)
您最近一年使用:0次
2016-11-30更新
|
403次组卷
|
9卷引用:2010年高考试题分项版文科数学之专题十七 选修系列
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