A triangle.
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A triangle.
Depending on the definition that is used, a trapezium is either a figure with four sides that has no parallel sides (American) or a figure with fours sides that has two parallel sides (British). Either way, a trapezium can not have 3 right angles.
if the angles of a figure are the same but the sides aren't, it is similiar. Congruent is angles and sides exactly the same
A pentagon has five sides and five angles.
Any triangle that is not a right angle triangle