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Disguised trapezoid (Posted on 2005-05-28) Difficulty: 3 of 5
Let ABCD be a quadrilateral. Suppose AB and CD have equal length and angles BAD and BCD are supplementary (i.e., angle BAD plus angle BCD equals 180 degrees). Show that AD is parallel to BC.

See The Solution Submitted by McWorter    
Rating: 4.2000 (5 votes)

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  Subject Author Date
CyclicBractals2005-05-29 01:50:35
Solution by ContradictionVictor Zapana2005-05-28 18:12:59
SolutionOne solutionGamer2005-05-28 17:09:21
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