1. How can I make a skateboard ramp that is 160 degrees with the ground?

2. In this lesson you will learn about exterior angles by exploring how they are related to triangles.

3. Let’s Review The three angles of a triangle always sum to 180°. 98 + 42 + 40 = 18084 + 69 + 27 = 180111 + 46+ 23 = 18090 + 68 + 22 = 180

4. An exterior angle is formed by extending a side of the polygon.

5. Core Lesson The measure of the exterior angle is related to the interior angles of a triangle. The interior angles of a triangle must sum to 180°. The interior angle next to the extended side and the exterior angle must sum to 180°. 68 + 29 + 83 = 180 68 + x = 180

6. Find the measures of angle CBD and angle CDB. Angle CBD = 180 - 106 Angle CBD = 74°74° Angle CDB = 180 – (76 + 74) Angle CDB = 30°30° Angle CBD = 74° Angle CDB = 30°

7. Core Lesson How can I make a skateboard ramp that is 160 degrees to the ground?

8. In this lesson you have learned about exterior angles by exploring how they are related to triangles.