The sides BC and AD of a quadrilateral ABCD are parallel. M is the midpoint of AB. The area of ABCD is S. Find the area of the triangle CMD in terms of S.
The sides BC and AD of a quadrilateral ABCD are parallel. M is the midpoint of AB. The area of ABCD is S. Find the area of the triangle CMD in terms of S.
I am not satisfied that this question is not from either a competition or graded assessment.
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Originally Posted by gunsandroses234 
