Question

what is the measure of angle y? image of a right triangle with one acute angle 40° and the other acute angle y options: 130°, 50°, 90°, 40°

Explanation:

Step1: Sum of triangle angles

A triangle's angles sum to $180^\circ$.

Step2: Identify known angles

The triangle has a right angle ($90^\circ$) and $40^\circ$.

Step3: Calculate angle y

$y = 180^\circ - 90^\circ - 40^\circ = 50^\circ$

Answer:

50°