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

8-106.

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

The sum of the interior angles in an -gon can be found by calculating

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

The sum of the two unlabeled angles is

. Why?