This document discusses properties of shapes and polygons. It defines polygons as shapes formed by at least 3 straight sides closed to form an area. Common polygons are then listed along with their number of sides and internal angles. Triangle has 3 sides and 3 internal 60 degree angles. Quadrilateral has 4 sides and 4 internal 90 degree angles. Pentagon through googolgon are also defined by their number of sides and internal angles.