Chapter 5.4, Problem 18PSB

To determine

To find: The area of given triangle.

Answer to Problem 18PSB

  $60\text{ sq unit}$ .

Explanation of Solution

Given information:

Three vertices of a triangle are $\left(-4,-3\right),\left(8,7\right),\left(8,-3\right)$ .

Calculation:

Three vertices of a triangle are $\left(-4,-3\right),\left(8,7\right),\left(8,-3\right)$ .

  

  $\begin{array}{l}\text{Area of triangle}=\frac{1}{2}\times base\times height\\ \Rightarrow \text{Area of triangle}=\frac{1}{2}\times 12\times 10\\ \Rightarrow \text{Area of triangle}=60\text{ sq unit}\text{.}\end{array}$

Hence, area of given triangle is $60\text{ sq unit}$ .