Infig.1,let beanequilateraltriangle,DandEbepointsonedge...
問題詳情:
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
(英漢詞典:equilateral等邊的;intersection交點;magnitude大小,量;indefinite不確定的)
【回答】
C
知識點:數學競賽
題型:選擇題