如图,
是以
为直径的半圆上两点,且
.
![](https://img.xkw.com/dksih/QBM/2016/12/9/1579058766381056/1579058767118336/STEM/b5980541bc9741ae8a1e044087eb3434.png)
(1)若
,证明:直线
平分
;
(2)作
交
于
.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85dc18a16a5e136f2f2022d3cbed6776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522464a0aad5fbed92d01ccb9b01fb24.png)
![](https://img.xkw.com/dksih/QBM/2016/12/9/1579058766381056/1579058767118336/STEM/b5980541bc9741ae8a1e044087eb3434.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98c8e36238ad90378e724466fcb6023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90be2908153fa6e4d84afe7d4c955e5.png)
(2)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/736590304a98a696eab763d948ed05c5.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/4508d8d0179798bb67b89433a3e310cd.png)
更新时间:2016-12-04 17:41:48
|
【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,
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
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在四边形
中,
,
于点
,点
是
延长线上一点,
,
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/f7aa70c9-874f-431e-95eb-c6c0071a89a4.png?resizew=168)
(1)求证:四边形
是菱形;
(2)若
平分
,
,
,求
和
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.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/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3aa1da9eef031c9562154530cbafb33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb91cb9a5a14169845d700fbd95890ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/f7aa70c9-874f-431e-95eb-c6c0071a89a4.png?resizew=168)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bfad3f7e65188bcf7f62ea5acdbf4a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6344778ed1e75c1a99e2268468081867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ba1df94176a1f769c7a0a12bf357fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93bfc2404dc5bcc32cd9ac5c21944708.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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