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Pentagon. A 5 sided figure with one pair of parallel sides and two right angles.

The question doesn't give enough information. Is it a polygon? If so, how many sides does it have? It could be 4 or any larger number. A 4-sided polygon with one pair of parallel sides is called a trapezoid (if you're American) or a trapezium (if you're British). (I don't know about other dialects of English.)
It sounds like the shape that you are talking about is a right trapezoid. It only has one pair of parallel sides but its two left angles are 90 degrees.

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12y ago

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