Chapter 13.7, Problem 15PSB

To determine

To find:The area of $\Delta DEF$ .

Answer to Problem 15PSB

The area of $\Delta DEF$ is $35\text{sq}\text{.unit}$ .

Explanation of Solution

The area of $\Delta DEF$ is calculated as,

  $\begin{array}{c}A\left(\Delta DEF\right)=\frac{1}{2}\times 7\times 10\\ =35\text{sq}\text{unit}\end{array}$

Therefore, the area of $\Delta DEF$ is $35\text{sq}\text{.unit}$ .