一个三角形的三个内角的度数之比为
,那么该三角形按角的大小分类,应为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/014510bd35fd8d7a411384263755d5d5.png)
A.锐角三角形 | B.直角三角形 | C.钝角三角形 | D.无法确定 |
更新时间:2021-09-07 13:22:29
|
【知识点】 三角形内角和定理的应用解读
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【推荐1】如图为
,
,
三岛的平面图,
岛在
岛的北偏东
方向,
岛在
岛的北偏东
方向,
岛在
岛的北偏西
方向,则
,
,
三岛组成一个 ( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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A.等腰直角三角形 | B.锐角三角形 | C.钝角三角形 | D.等边三角形 |
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【推荐2】如图,在
中,
垂直平分
于点E,交
于点D,连接
,
的垂直平分线交
于点F,连接
,设
,
,则
的大小为( )
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A.![]() | B.![]() |
C.![]() | D.![]() |
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