This document provides examples of calculating the area of a trapezoid using the formula Area = 1⁄2(b+B)h, where b and B are the two bases and h is the height. It demonstrates finding the height when it is not explicitly given by using properties of isosceles triangles or the Pythagorean theorem. In one example, it shows dividing the larger base into pieces to find the height of two congruent triangles formed. In another, it notes that if the base angles are 45 degrees, the triangles formed will be isosceles and the shared height can be used for the trapezoid area.