Math 20-2: Proving Angle Properties in Triangles

1. Proving Triangle Properties:
a) Sum of interior angles is 180 degrees: 00:04
b) An exterior angle = the sum of the two non-adjacent interior angles: 05:10
2. Definitions:
a) Exterior Angle: 03:35
b) Non-adjacent interior angle: 04:12
3. Determine missing angle measures examples: 08:01