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A four-sided shape in which only two sides are parallel is called a trapezoid. All two-dimensional, four-sided shapes are known as quadrilaterals.
This figure is called a trapezoid or trapezium.
A four-sided shape is a quadrilateral. With only one pair of parallel sides, it would be called a trapezoid (UK trapezium).
Rectangle
A trapezoid which is also called a trapezium depending where you live.