A quadrilateral is a four-sided polygon with four angles. There are many kinds of quadrilaterals. The five most common types are the parallelogram, the rectangle, the square, the trapezoid, and the rhombus. In this chapter we will learn about polygons, different types of quadrilaterals, and the special case of parallelograms!
Polygons are many-sided figures, with sides that are line segments. Polygons are named according to the number of sides and angles they have. The most familiar polygons are the triangle, the rectangle, and the square. In this topic we will learn about the exterior angle property, interior angle property, and we will also practice with some exercises related to polygons.