Chapter 8, Problem 22RE

In Problems 21-25, find the area of each triangle.

$b=4$, $c=10$, $A={70}^{\circ }$

To determine

To find: The area of the triangle.

Answer to Problem 22RE

Solution:

$A \approx 18.79$

Explanation of Solution

Given:

$b = 4, c = 10, A = 70°$

Formula used:

$A = \frac{1}{2} * bc\text{sin}A$

Calculation:

$b = 4, c = 10, A = 70°$

$A = \frac{1}{2} * bc\text{sin}A$

$A = \frac{1}{2} * 4 * 10 * \text{sin}70°$

$A = 20 * \text{sin}70$

$A \approx 18.79$