Infig.1,let beanequilateraltriangle,DandEbepointsonedge...
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问题详情:
In fig. 1, let be an equilateral triangle, D and E be points on edges AB and AC respectively, F be intersection of segments BE and CD, and , then the magnitude relation between Ad and CE is ( )
A. B. C. D. indefinite
(英汉词典:equilateral等边的;intersection交点;magnitude大小,量;indefinite不确定的)
【回答】
C
知识点:数学竞赛
题型:选择题