1 . 选修4—1:几何证明选讲
如图,正方形
边长为2,以
为圆心、
为半径的圆弧与以
为直径的半圆
交于点
,连结
并延长交
于点
.
![](https://img.xkw.com/dksih/QBM/2015/11/24/1572303048089600/1572303053774848/STEM/2b0f6c30d08f4e0cb3a387d46d38108a.png)
(1)求证:
;
(2)求
的值.
如图,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2015/11/24/1572303048089600/1572303053774848/STEM/2b0f6c30d08f4e0cb3a387d46d38108a.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2015/11/24/1572303048089600/1572303053774848/STEM/f517e292c11c41738576ba48ba458eee.png)
(2)求
![](https://img.xkw.com/dksih/QBM/2015/11/24/1572303048089600/1572303053774848/STEM/b8c0ccf4209b4eb19bfe65d27a72052d.png)
您最近一年使用:0次
2016-12-03更新
|
189次组卷
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4卷引用:2016届宁夏银川一中高三上学期第三次月考理科数学试卷
13-14高三上·宁夏银川·阶段练习
2 . 如图,已知
切⊙
于点E,割线PBA交⊙
于A、B两点,∠APE的平分线和AE、BE分别交于点C、D.求证:
![](https://img.xkw.com/dksih/QBM/2014/1/2/1571454908710912/1571454914494464/STEM/a8ee2f252b6e49ac876894fc8562434d.png)
(Ⅰ)
;
(Ⅱ)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2014/1/2/1571454908710912/1571454914494464/STEM/a8ee2f252b6e49ac876894fc8562434d.png)
(Ⅰ)
![](https://img.xkw.com/dksih/QBM/2014/1/2/1571454908710912/1571454914494464/STEM/0ab87b06907e49b9ba7a83791dd99339.png)
(Ⅱ)
![](https://img.xkw.com/dksih/QBM/2014/1/2/1571454908710912/1571454914494464/STEM/402c81717bd247ffaa0225f0286085ac.png)
您最近一年使用:0次
2016-12-02更新
|
591次组卷
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3卷引用:2014届宁夏银川九中高三上学期第四次月考理科数学试卷
11-12高三·宁夏银川·阶段练习
3 . 如图,
是圆的内接四边形,
,过
点的圆的切线与
的延长线交于
点,证明:
(Ⅰ)
;
(Ⅱ)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(Ⅰ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681e40436b161294d9f712ee33a93e88.png)
(Ⅱ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80a8f4be0d7d333333d616b6d43d4b67.png)
![](https://img.xkw.com/dksih/QBM/2012/2/21/1570758885466112/1570758891085824/STEM/7791c76107094152bfd2890c5f8682eb.png?resizew=231)
您最近一年使用:0次
11-12高三上·宁夏银川·阶段练习
4 . 如图,
是
的直径,
是弦,
的平分线
交
于
,
交
延长线于点
,
交
于点
.
(I)求证:
是
的切线;
(II)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(II)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf253af4f8c82dad9e17ec2eae47346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929e72e9d26c3bda1fba680ca48cd95d.png)
![](https://img.xkw.com/dksih/QBM/2011/12/21/1570627187744768/1570627193307136/STEM/06290dd6-dd51-47a5-9eb2-d722edbe87a5.png?resizew=201)
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2010·辽宁·一模
5 . 选修4-1:几何证明选讲
如图所示,已知PA与⊙O相切,A为切点,PBC为割线,弦CD∥AP,AD、BC相交于E点,F为CE上一点,且DE2=EF·EC.
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307677011968/1570307682656256/STEM/253247442818499499074f567058fd80.png)
(1)求证:ÐP=ÐEDF;
(2)求证:CE·EB=EF·EP.
如图所示,已知PA与⊙O相切,A为切点,PBC为割线,弦CD∥AP,AD、BC相交于E点,F为CE上一点,且DE2=EF·EC.
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307677011968/1570307682656256/STEM/253247442818499499074f567058fd80.png)
(1)求证:ÐP=ÐEDF;
(2)求证:CE·EB=EF·EP.
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2016-12-04更新
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97次组卷
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3卷引用:2017届宁夏银川一中高三上学期月考一数学(文)试卷