Question

in the figure below, ( l parallel m ). find ( x ).

Explanation:

Step1: Use alternate interior angles

The 39° angle has an alternate interior angle equal to 39° at the bottom left of the triangle, and the 48° angle has an alternate interior angle equal to 48° at the bottom right of the triangle.

Step2: Sum of triangle angles is 180°

$$x + 39 + 48 = 180$$

Step3: Solve for x

$$x = 180 - 39 - 48$$
$$x = 93$$

Answer:

$93$