下列说法中,正确的是( )
A.三角形的高都在三角形内部 |
B.三角形的一个外角大于任意一个内角 |
C.等腰三角形的角平分线、中线、高相互重合 |
D.三角形三条角平分线交于一点且交点到三角形三边距离相等 |
更新时间:2023-03-06 10:47:21
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【推荐1】下列说法正确的有( )个
①任何数的0次幂都等于1.②同底数幂相乘,底数不变,指数相加.③有一个角是60°的三角形是等边三角形.④到三角形三条边距离相等的点是三角形三条中线的交点.⑤到三角形三个顶点距离相等的点是三角形三边垂直平分线的交点.
①任何数的0次幂都等于1.②同底数幂相乘,底数不变,指数相加.③有一个角是60°的三角形是等边三角形.④到三角形三条边距离相等的点是三角形三条中线的交点.⑤到三角形三个顶点距离相等的点是三角形三边垂直平分线的交点.
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】在
中,
,
平分
,交
于点
,
,垂足为点
,若
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96d9e134e1820d80612be1bc590993e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
A.3 | B.![]() | C.2 | D.6 |
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【推荐1】如图,
是
的高,
,
交
于
,下列说法正确的有( )
①
是
的高;②
是
的高;③
是
的高;④
是
的高.
![](https://img.xkw.com/dksih/QBM/2019/10/25/2319597443039232/2320213112266752/STEM/1935cf4a717d44768cdd6e2b45e8a44a.png?resizew=120)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bd2ff460ff8dbaf1d93a299b5a173a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9966839944bf4087bd18fede1d2d2c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdbbc61985b4b1063e0e966de68fbdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1975abdfba3d89ee75a40e4239f6e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc727c642cbc2181476b7dd8eca471e.png)
![](https://img.xkw.com/dksih/QBM/2019/10/25/2319597443039232/2320213112266752/STEM/1935cf4a717d44768cdd6e2b45e8a44a.png?resizew=120)
A.l个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图所示,
的边
上的高是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/1c0216a7-c948-492e-b6f5-33011567f277.jpg?resizew=154)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/1c0216a7-c948-492e-b6f5-33011567f277.jpg?resizew=154)
A.线段![]() | B.线段![]() | C.线段![]() | D.线段![]() |
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【推荐1】如图,
是
的弦,
是
的切线,A 为切点,
经过圆心.若
,则
的大小等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】将一副三角板按照如图方式摆放,点
共线,
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的度数为( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在
中,
,
;在
上任取一点
,延长
到
,使
;在
上任取一点
,延长
到
,使
;按此做法继续下去,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/2022/4/14/2963844604592128/2987039335907328/STEM/c83aff9d-f3ec-4958-9baa-8e04087c61bf.png?resizew=352)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,在菱形
中,
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的垂直平分线
交
于点
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的度数为( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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