Click Green Flag Coding draws regular 2D polygons from 3 sides to 10 sides and calculates the interior and exterior angles. At the end of the program lists will show all the interior and exterior angles.
What do you notice about the relationships among the number of sides, the interior angles, and the exterior angles? What predictions can you make about a 2D regular polygon with 20 sides? 45 sides? 100 sides? Can you remix to prove your predictions?