Math 20-2: Angle Properties in Polygons

1. Definitions
a) Convex Polygon: 00:04
b) Non-Convex (Concave) Polygon: 00:28
c) Regular Polygon: 00:49
2. Investigate how to determine the sum of interior angles and the measure of each interior angle in a regular polygon: 01:12
3. Examples: 08:35