如图,
是半圆
的直径,
,垂足为
,
,
与
、
分别交于点
、
.
![](https://img.xkw.com/dksih/QBM/2016/9/29/1573050457694208/1573050463887360/STEM/1de7c027e04c46c1a3ad35ebc86c20fc.png)
(Ⅰ)证明:
;
(Ⅱ)证明:
.
![](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/17be90850a55d8b037e15d45de2bab0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f0c03f974573341b60eee32f99dc574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/2016/9/29/1573050457694208/1573050463887360/STEM/1de7c027e04c46c1a3ad35ebc86c20fc.png)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e5da018631d63e9a06a034d1d7046c.png)
(Ⅱ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
更新时间:2016-09-27 11:26:50
|
【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】选修4-1:几何证明选讲
如图,已知
是
的外角
的平分线,交
的延长线于点
,延长
交
的外接
圆于点
,连结
.
![](https://img.xkw.com/dksih/QBM/2016/8/24/1572992052699136/1572992059105280/STEM/faa8b2cb2dfb439d87c61ccb345abf2d.png)
(1)求证:
;
(2)若
,求
的长.
如图,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6344778ed1e75c1a99e2268468081867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
圆于点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa175408eddbdfddfbe9701646d62b92.png)
![](https://img.xkw.com/dksih/QBM/2016/8/24/1572992052699136/1572992059105280/STEM/faa8b2cb2dfb439d87c61ccb345abf2d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07b92b8282c7fd1158b3b5098e38c39.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ddfcdeed612c9976ecaca2d2b63d14d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,圆O的直径
,P是
延长线上一点,
,割线
交圆O于点C,D,过点P作
的垂线,交直线
于点E,交直线
于点F.
(1)求证:
;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a0367c3fe3c5c5dfefec87f641bbde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aaa89732b930eeaaf5067b352c0eff3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c3f75d0069e85103809a2e4e9fc479.png)
![](https://img.xkw.com/dksih/QBM/2014/8/5/1571831925030912/1571831930806272/STEM/d58b62c827de431b9b1289aff3dcf0f3.png?resizew=147)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐3】【选做题】在A,B,C,D 四小题中只能选做两题 ,每小题10分,共计20分.请在答题卡指定区域 内作答,解答时应写出文字说明、证明过程或演算步骤.
A.选修4—1:几何证明选讲
B.选修4—2:矩阵与变换
C.选修4—4:坐标系与参数方程
D.选修4—5:不等式选讲
【必做题】第22题、第23题,每题10分,共计20分.请在答题卡指定区域 内作答,解答时应写出文字说明、证明过程或演算步骤.
A.选修4—1:几何证明选讲
如图所示,为⊙
的直径,
平分
交⊙
于
点,过
作⊙
的切线交
于点
,求证
.
B.选修4—2:矩阵与变换
已知矩阵的一个特征值为3,求
.
C.选修4—4:坐标系与参数方程
在平面直角坐标系中,圆
的参数方程为
为参数
.
以原点为极点,以
轴正半轴为极轴的极坐标系中,直线
的极坐标方程为
,已知圆心
到直线
的距离等于
,求
的值.
D.选修4—5:不等式选讲
已知实数满足
,
,求证:
.
【必做题】第22题、第23题,每题10分,共计20分.请在
您最近一年使用:0次