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Classifying Quadrilaterals Tree

A closed polygon which has 4 sides is called a quadrilateral. Try to drag the points on the polygons in this activity to illustrate the different types of quadrilaterals listed below? The top one is done for you.
1) Is a square a rectangle? Why or why not? 2) Is a square a rhombus? Why or why not? 3) Is a square a trapezoid? Why or why not?