如图,设
是弦
延长线上一点,且
,过
作圆的切线于
,若
为线段
的中点,连结
交圆于点
,若
.
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572624032727040/1572624038928384/STEM/a9873329fd554a078bdb8cad244ee152.png)
(1)求证:
;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d03307f689eeb4ecb052c1f27bc9dc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ace421df73f31a8e967a1c2c62bfba.png)
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572624032727040/1572624038928384/STEM/a9873329fd554a078bdb8cad244ee152.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f7392aa403ca9e6d70c332c66a83f8.png)
(2)求证:
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572624032727040/1572624038928384/STEM/dc1fba21d0c84b999d7b255a4e8176fa.png)
更新时间:2016-12-04 06:54:42
|
【知识点】 几何证明选讲
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图所示,在⊙O中,相交于点E的两弦AB,CD的中点分别是M,N,直线MO与直线CD相交于点F.证明
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/26/cdcc2cdf-e541-42c8-bbce-48c05d3a473d.png?resizew=240)
(1)∠MEN+∠NOM=180°;
(2)FE·FN=FM·FO.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/26/cdcc2cdf-e541-42c8-bbce-48c05d3a473d.png?resizew=240)
(1)∠MEN+∠NOM=180°;
(2)FE·FN=FM·FO.
您最近一年使用:0次
解答题-证明题
|
适中
(0.64)
【推荐2】【选修4-1:几何证明选讲】
如图,
是
的直径,弦
与
垂直,并与
相交于点
,点
为弦
上异于点
的任意一点,连接
、
并延长交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975353864192/1572975359819776/STEM/ce1e4a54bce247a29a64c5dcfcd4ef76.png)
(Ⅰ)求证:
四点共圆;
(Ⅱ)求证:
.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975353864192/1572975359819776/STEM/0ef3fa624ed9409ebe65317b73e82d71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975353864192/1572975359819776/STEM/0ef3fa624ed9409ebe65317b73e82d71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975353864192/1572975359819776/STEM/ce1e4a54bce247a29a64c5dcfcd4ef76.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f804f3c39d7719eb05cc8bb83a3813.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2c519cfba4bff6d059265190499986.png)
您最近一年使用:0次