Question

find x.
60°
30°
180°
90°

Explanation:

Step1: Sum angles in triangle

The sum of angles in a triangle is $180^\circ$. The triangle has a right angle ($90^\circ$) and a $30^\circ$ angle.
$x + 90^\circ + 30^\circ = 180^\circ$

Step2: Solve for x

Isolate $x$ by subtracting known angles.
$x = 180^\circ - 90^\circ - 30^\circ = 60^\circ$

Answer:

60°