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1 vote
Why are trapezoids not a subset of parallelograms ?

User Glauco
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2 Answers

5 votes
A trapezoid has at least one pair of parallel sides and the narrow view excludes it from being a subset of parallelograms. Parallelograms have 2 parallel sides.
User Brandon Stewart
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6 votes
Because not all sides are =
User Muz
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