1 . 选修4-1:几何证明选讲
已知直线
与圆
相切于点
,经过点
的割线
交圆
于点
和点
,
的平分线分别交
、
于点
和
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/12dc98a3-1b6d-4fd1-b736-4aca1d54f188.png?resizew=219)
(1)证明:
;
(2)若
,求
的值.
已知直线
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/e10c82174fb0401382039070c04ab89d.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/5d872bbf383e4bf68351861936f2f338.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/5189ce1a15714676b43de17013cbfd6e.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/5d872bbf383e4bf68351861936f2f338.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/f9ef9add05804a0e86d14cb25f100f35.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/5d872bbf383e4bf68351861936f2f338.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/851059773c4f4a9bbc55349ef36428b9.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/9b077f553741425a87098b787382d23b.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/8c0ac6c270b946bdbe3a7bce67cdfb91.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/ad15bd207c09463fbd172c46cbf2e210.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/dc80291f243845ac8b868c98985569c0.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/c3714d814a78430a834b70947e442494.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/54953e17d9fc43ab81cc6193d0f0445a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/12dc98a3-1b6d-4fd1-b736-4aca1d54f188.png?resizew=219)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/41393a6b191e41b5bcf43bb05b6e9d58.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/d4075433450a49a2b9d1cdf69164bea7.png)
![](https://img.xkw.com/dksih/QBM/2016/3/1/1572507975041024/1572507981373440/STEM/c4789e907c584e12a0d374f83533932c.png)
您最近一年使用:0次
2016-12-04更新
|
178次组卷
|
2卷引用:2015届贵州省凯里一中高三模拟考试文科数学试卷
2 . 如图,
是圆
的直径,直线
与圆
相切于
,
垂直
于
,
垂直
于
,
垂直
于
,
垂直
于
,连接
,证明:
![](https://img.xkw.com/dksih/QBM/2015/10/10/1572253366255616/1572253372506112/STEM/f37bc6b58afa4bccb990db7c0a4acb35.png?resizew=167)
(Ⅰ)
;
(Ⅱ)
.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3692cbeb579e58fef5217b2637b9cc.png)
![](https://img.xkw.com/dksih/QBM/2015/10/10/1572253366255616/1572253372506112/STEM/f37bc6b58afa4bccb990db7c0a4acb35.png?resizew=167)
(Ⅰ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5606fe9850434cf5ce49713e5a58a42.png)
(Ⅱ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4142f9f0879a52671c0c5520c7c671a7.png)
您最近一年使用:0次
2016-12-03更新
|
462次组卷
|
4卷引用:2016届广东省惠州市高三第一次调研考试数学理试卷1
3 . 如图,已知△ABC是等边三角形,D、E分别在边BC、AC上,且CD=CE,连接DE并延长至点F,使EF=AE,连接AF、BE和CF.
![](https://img.xkw.com/dksih/QBM/2016/10/6/1578976699621376/1578976700227584/STEM/986bfbb1f6894830824f6c5ffbd14cb3.png)
(1)请在图中找出一对全等三角形,用符号“≌”表示,并加以证明.
(2)判断四边形ABDF是怎样的四边形,并说明理由.
(3)若AB=6,BD=2DC,求四边形ABEF的面积.
![](https://img.xkw.com/dksih/QBM/2016/10/6/1578976699621376/1578976700227584/STEM/986bfbb1f6894830824f6c5ffbd14cb3.png)
(1)请在图中找出一对全等三角形,用符号“≌”表示,并加以证明.
(2)判断四边形ABDF是怎样的四边形,并说明理由.
(3)若AB=6,BD=2DC,求四边形ABEF的面积.
您最近一年使用:0次
4 . 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)
您最近一年使用:0次
2016-09-27更新
|
111次组卷
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2卷引用:2017届湖南益阳市高三9月调研数学(理)试卷