This chapter starts with the properties of polygons and narrows to focus on quadrilaterals. We will study several different types of quadrilaterals: parallelograms, rhombi, rectangles, squares, kites, and trapezoids. Then, we will prove that different types of quadrilaterals are parallelograms or something more specific.

8.1 Properties of Parallelograms and Proving Parallelograms

8.2 Rectangles, Rhombi, & Squares

8.3 Trapezoids & Kites

8.4 Quadrilaterals in the Coordinate Plane