如图,
是
的内接三角形,
,
,D是
边上一点,连接
并延长交
于点E.若
,
,则
的半径为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/91ead2cb-3e39-4007-a0eb-131fed522bcc.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6370d6c626bdabf1fc694501ee6c714f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/91ead2cb-3e39-4007-a0eb-131fed522bcc.png?resizew=164)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-03-07 22:25:56
|
相似题推荐
单选题
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适中
(0.65)
名校
【推荐1】如图所示,点
为
三个内角平分线的交点,
度,
,点
,
分别为
,
上的点,且
.甲、乙、丙三位同学有如下判断:
甲:
度;
乙:四边形
的面积是不变的;
丙:当
时,
周长取得最小值.
其中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/afe533ae-1806-43d9-9ccd-9a0eebde580c.png?resizew=221)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d4cf8418de2899f046cb950f6437795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6787e4b569d29bba3e72ae6bee166add.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e7d95578c9ba65c367d33948b6f4d2.png)
甲:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d245bb2c95926e7815f5483d736bcb7b.png)
乙:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6897c275957c00bb8237021a80843ad2.png)
丙:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d5e50b028ec26453dccf98fe3924cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f02028a3847c4807c2d3cf0ea7efb8.png)
其中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/afe533ae-1806-43d9-9ccd-9a0eebde580c.png?resizew=221)
A.只有丙正确 | B.只有甲、乙正确 | C.只有乙、丙正确 | D.甲、乙、丙都正确 |
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【推荐2】如图,在
中,
,
.点P为直线
上一动点,并沿直线
从右向左移动,若点P与
三个顶点中的至少两个顶点构造成等腰三角形时,则将点P在直线
上进行标记.那么满足条件的点P(不与点B、C重合)的位置有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/f9cde905-d249-41f8-a412-56a60646ffc8.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec69d43f611d65d9b0dc642a83f12ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10ad623f3a05ecdc27b3f3e0169669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/f9cde905-d249-41f8-a412-56a60646ffc8.png?resizew=175)
A.3个 | B.4个 | C.6个 | D.8个 |
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【推荐1】如图,已知,
为
上一点,以
为半径的圆经过点
,且与
、
交于点
、
,设
,
,则
( )
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
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【推荐2】如图,AB为⊙O的直径,C为⊙O上一点,弦AD平分∠BAC,交BC于点E,AB=6,AD=5,则DE的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/f78e2305-6b4c-4364-bc4c-4a34e8ef8bed.png?resizew=215)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/f78e2305-6b4c-4364-bc4c-4a34e8ef8bed.png?resizew=215)
A.2.2 | B.2.5 | C.2 | D.1.8 |
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【推荐1】如图,△ABC是⊙O的内接三角形,AD⊥BC于D点,且AC=5,CD=3,AB=4
,则⊙O的直径等于( )
![](https://img.xkw.com/dksih/QBM/2019/6/2/2216817931173888/2217868376514560/STEM/ff2719d2375e41ba8a1b05e994baddfd.png?resizew=115)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2019/6/2/2216817931173888/2217868376514560/STEM/ff2719d2375e41ba8a1b05e994baddfd.png?resizew=115)
A.![]() ![]() | B.3![]() | C.5![]() | D.7 |
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【推荐2】如图,已知点
,
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A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次