Question

a triangle has interior angle measures of a, 59°, and 59°. what is the value of a? a = □°

Explanation:

Step1: Recall angle - sum property

The sum of interior angles of a triangle is 180°. So, $a + 59^{\circ}+59^{\circ}=180^{\circ}$.

Step2: Solve for a

$a=180^{\circ}-(59^{\circ}+59^{\circ})$.
First, calculate $59^{\circ}+59^{\circ}=118^{\circ}$. Then, $a = 180^{\circ}-118^{\circ}=62^{\circ}$.

Answer:

$62$