三角形的三个外角的和是( )
A.90° | B.180° | C.270° | D.360° |
更新时间:2021-03-04 23:31:01
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【知识点】 三角形的外角的定义及性质解读
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【推荐1】如图,在
中,D是
边上一点,
.将
沿
所在直线翻折,使点B落在
边上的点E处.若
,则
等于( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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