Question

find the value of y.

Explanation:

Step1: Use exterior - angle property

The exterior - angle of a triangle is equal to the sum of the two non - adjacent interior angles. Here, the exterior angle is 98°, and the two non - adjacent interior angles are y° and 53°. So, we have the equation $y + 53=98$.

Step2: Solve for y

Subtract 53 from both sides of the equation: $y=98 - 53$.

Answer:

$y = 45$