如图,已知
平分
,
.
(1)求证:
;
(2)若点
在
上,且
,求证:四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
(2)若点
![](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/9a1371c96162b62b4735829affef0420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adfe2a58326612fcabd34fd4402a66ee.png)
![](https://img.xkw.com/dksih/QBM/2021/9/11/2805931766906880/2806721517223936/STEM/ae2067cad87d48ae9e22c8a529df1416.png?resizew=171)
更新时间:2021-09-12 21:12:27
|
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解答题-证明题
|
较易
(0.85)
【推荐1】如图.在
中,
.
,
分别平分
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/0f7db6e6-a8ea-4963-8512-15c9877d82fc.png?resizew=168)
(1)求
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(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15886bb1365d039d8e4450cae287788d.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870db8090d5c4d194c25cf1355968f29.png)
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解答题-证明题
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较易
(0.85)
【推荐2】如图,点A、F、C、D在同一条直线上,
//
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd07a40e390bdd1101ff60e4674f5f71.png)
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您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐1】如图,在
中,弦
和半径
相交于点
与
互相平分,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/d2e4076b-f5ce-41b1-a19e-26270d623065.png?resizew=168)
(1)求证:四边形
是菱形;
(2)若扇形
(图中阴影部分)的面积为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aebd424b8163d98cc811711585672cd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/d2e4076b-f5ce-41b1-a19e-26270d623065.png?resizew=168)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ea16ceca816f7d3d50650af141baf42.png)
(2)若扇形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/642c32c572936757073b3e6d3f6e4a40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2b34fbfbe30bea03ef04ee293d8368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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解答题-证明题
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较易
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【推荐2】如图,在
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