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.
我选E,答案是A.作者: himba 时间: 2005-2-22 12:59
中位线是其平行边长的一半，高也是被中位线平均分的。
ABg面积=1/2AB*1/2H
RCS面积=1/8AB*1/4H
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