在一个等腰三角形中,一个内角的度数是另一个内角度数的2倍,这个三角形3个内角的度数分别是好多?

问题描述:

在一个等腰三角形中,一个内角的度数是另一个内角度数的2倍,这个三角形3个内角的度数分别是好多?
如题..
3个回答 分类:数学 2014-10-14

问题解答:

我来补答
因为是等腰三角形,所以设一个角为X,另一个角也为X,
因为是二倍,所以第三个角是2X.
X+X+2X=180(三角形内角和是180度)
所以X=45,2X=90.
应该能明白了吧.
 
 
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补充回答:

三角形的内角和是180度。
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