A trapezium is a quadrilateral with one pair of parallel sides. Image caption, Move the right-angled triangle so that the shape becomes a rectangle. The rectangle has the same area as the ...
A quadrilateral is a four-sided shape. It could be a square, rectangle, kite, rhombus, parallelogram or trapezium. For any quadrilateral, the angles of the four corners add up to \(360^\circ\).
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