选修4—1:几何证明选讲
如图,
是⊙
的直径,
是⊙
上的两点,
⊥
,过点
作⊙
的切线FD交
的延长线于点
.连结
交
于点
.
求证:
.
如图,
![](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/ea9aa3f533894ca87a394f7a1dfd0ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/768c46a01f0f3403b7bb59348ca28823.png)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1571957203386368/1571957209137152/STEM/0d9d65d4329041bc8860544ed9104ad5.png)
更新时间:2016-12-03 08:18:02
|
【知识点】 几何证明选讲
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【推荐1】选修4-1:几何证明选讲
如图,圆周角
的平分线与圆交于点
,过点
的切线与弦
的延长线交于点
,
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/6ecf7537-615d-438a-90ea-48a579e845f6.png?resizew=183)
(1)求证:
;
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,求
.
如图,圆周角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/6ecf7537-615d-438a-90ea-48a579e845f6.png?resizew=183)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2f3d75dcd6a50e517070f191d036928.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54583088b8451cdc5ae13b739a8eebb.png)
![](https://img.xkw.com/dksih/QBM/2016/7/1/1572867999465472/1572868005969920/STEM/afed2d2f12ca452aa7e1185f3712bb01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
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解答题-证明题
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适中
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【推荐2】选修4-1:几何证明选讲
如图,BA是⊙O的直径,AD⊥AB,点F是线段AD上异于A、D的一点,且BD、BF与⊙O分别交于点C、E.求证:
.
如图,BA是⊙O的直径,AD⊥AB,点F是线段AD上异于A、D的一点,且BD、BF与⊙O分别交于点C、E.求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6edea9bd1da87ebee1c97e789fee9c6.png)
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