How Do You Classify Quadrilaterals?

A rectangle, a rhombus, a square, a trapezoid, and a parallelogram, are these quadrilaterals? What are the criteria that make and shape a quadrilateral? It has something to do with parallel sides, congruent sides, and congruent angles. How do these quadrilaterals get their own special name? Watch as the instructor explains the criteria of the shapes and helps to classify them.

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