Question

1. what is the measure of angle x°?

options: 60°, 30°, 90°, 180°

Explanation:

Step1: Sum of triangle angles is 180°

The total of angles in a triangle is $180^\circ$.

Step2: Identify known angles

Known angles: $90^\circ$, $60^\circ$.

Step3: Calculate $x$

$x = 180^\circ - 90^\circ - 60^\circ = 30^\circ$

Answer:

B. $30^\circ$