By A Mystery Man Writer
Define and identify interior angles and exterior angles of triangles. Use properties of angles and triangles to calculate unknown interior angles and exterior angles.
Interior & Exterior Angles of a Triangle
Angles in a Triangle
EXTERIOR ANGLE THEOREM (Part 1: Exploration)
Triangle exterior angle example (video)
Exterior Angle Theorem - Formula & Examples
Understanding Interior and Exterior Angles in Triangles
Interior and Exterior Angles of Triangles (Video & Examples)
Lesson Explainer: Interior and Exterior Angles of Triangles
Exterior Angle Theorem