Question

problem 20: (first taught in lesson 31) find y. after you enter your answer press go. y =

Explanation:

Step1: Recall exterior - angle property

The exterior angle of a triangle is equal to the sum of the two non - adjacent interior angles.

Step2: Set up the equation

$y=89 + 23$

Step3: Calculate the value of y

$y = 112$

Answer:

$y = 112$