1. Angles of Triangles

2. What are Interior and Exterior Angles
Interior Angles are angles inside a polygon.
When the sides of a polygon are extended, other angles are formed.
Exterior Angles are the angles outside of the polygon that are adjacent to the interior angles.

3. Interior Angles Measures of a Triangle

4. Using Interior Angle Measures
Find the value of x.

5. Practice
Find the value of x.

6. Exterior Angle Measures of a Triangle

7. Finding Exterior Angle Measures
Find the measure of the exterior angle.

8. Practice
Find the measure of the exterior angle.

9. Real Life Application
An airplane leaves from Miami and travels around the Bermuda Triangle. What is the value of x?
Use what you know about the interior angle measures of a triangle to write an equation.