### Home > INT2 > Chapter 8 > Lesson 8.4.3 > Problem8-106

8-106.

Use the angle relationships in each of the diagrams below to solve for the given variables. Show all work. Homework Help ✎

The sum of the interior angles in an $n$-gon can be found by calculating ($n - 2$)$180°$.

1. $m = 133°$

1. Start by determining the measures of the base angles of the isosceles triangle.

1. The sum of the two unlabeled angles is $180°$. Why?