### 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. Homework Help ✎

a. | b. | |

c. |

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

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

The sum of the two unlabeled angles is 180º. Why?