###### Example2.1.10Geometry

An expression for the area of a trapezoid (shown in Figure 2.1.11) is $$\frac{1}{2}(a+b)h\text{,}$$ where $$a$$ and $$b$$ are the parallel side lengths and $$h$$ is the height. This expression is valid if $$a\text{,}$$ $$b\text{,}$$ and $$h$$ are all measured in centimeters, inches, or any other unit for length. The result will be measured in square units, such as cm2 or in2.

Determine the area of a trapezoid for which $$a=3\,\text{cm}\text{,}$$ $$b=5\,\text{cm}\text{,}$$ and $$h=2\,\text{cm}\text{.}$$

Solution
in-context