作者pidong (你一直都懂，不是吗？)
看板GMAT
标题[问题] 三角形如何从题目中判断
时间Tue Aug 16 16:49:18 2016
Q:
In triangle ABC, point X is the midpoint of side AC and point Y is the midpoint
of side BC. If point R is the midpoint of line segment XC and if point S is the
midpoint of line segment YC, what is the area of triangular region RCS?
(1) The area of triangular region ABX is 32.
(2) The length of one of the altitudes of triangle ABC is 8.
答案是Ａ
但是我随便画一个三角形 怎麽知道Ａ要怎麽求呢？
谢谢
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1F：推 demonhom: (1)可推出ABC面积，进而可推出CXS面积 08/16 18:55
2F：→ demonhom: 更正CRS 08/16 18:56