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A trapezium is a quadrilateral with two parellel sides which are not of equal length. If it is represented with its longest of the two parallel sides at the bottom, its two top angles are obtuse, or one is a right angle, and its two bottom angles are acute, though the one below a right angle would also be a right angle. The area of the trapezium is determined by multiplying the distance between the two parallel sides (called the height) by the average length of the two parallel sides.

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15y ago

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