1 . 选修4-1:几何证明选讲
如图,
是的⊙
直径,
与⊙
相切于
,
为线段
上一点,连接
、
, 分别交⊙
于
、
两点,连接
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/f11eb3d9-f4d4-4fe1-a689-e5998cd8db23.png?resizew=216)
(Ⅰ)求证:
、
、
、
四点共圆.
(Ⅱ)若
为
的三等分点且靠近
,
,
,求线段
的长.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d25313067f3e11f68da496344c4956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186354626d5a1d13b88dfb4df916947b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186354626d5a1d13b88dfb4df916947b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186354626d5a1d13b88dfb4df916947b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/f11eb3d9-f4d4-4fe1-a689-e5998cd8db23.png?resizew=216)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929adbe2211b012b66fe725d478274c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929adbe2211b012b66fe725d478274c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
您最近一年使用:0次
2016-12-03更新
|
253次组卷
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2卷引用:2016届辽宁省五校协作体高三上学期期初考试理科数学试卷
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:2016届辽宁省营口市大石桥二中高三上学期期末理科数学试卷