A quadrilateral is a polygon (i.e. 2D shape) with four edges (or sides) and four vertices or corners. Examples of quadrilaterals are illustrated below.
In this section, we’ll focus on finding the area of trapezoids (right). A comparison of how to find the area of different quadrilaterals, namely the parallelograms (left) and rhombuses (center) are also shown.
Of these three, the more complicated area to find is the one for trapezoids. The video below shows two examples: the first is a basic look at how the area formula is used, while the second shows how you can analytically break down a trapezoid into three segments.