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?[br][br][br]2) Is a square a rhombus? Why or why not?[br][br][br]3) Is a square a trapezoid? Why or why not?