# Exterior Angle Theorem for Triangles

- Author:
- Shawn Godin

- Topic:
- Triangles

**Exterior Angle Theorem for Triangles**Any exterior angle of a triangle is equal to the sum of the two opposite interior angles. In the sketch you can move the blue points (A, B, C). When you click on one of the exterior angles, you see the exterior angle theorem applied to that angle.