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(1999•烟台)下列命题中,假命题是( ) A.有一个角等于50°的两个直角三...
(1999•烟台)下列命题中,假命题是( )
A.有一个角等于50°的两个直角三角形相似
B.有一个角等于60°的两个等腰三角形相似
C.有一个角等于50°的两个等腰三角形相似
D.有一个角等于120°的两个等腰三角形相似
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