Video Lesson (Geometry)
Video Tutorial: Constructing Regular Polygons in Geometry
This video demonstrates all the different regular polygons that can be drawn using a ruler and compass. They are the polygons of 3, 4 and 5 sides, as well as their doubles (6, 8, 10), quadruple (12, 16, 20) and so on. Pentadecagons (15 sides) can also be drawn and, surprisingly, polygons of 17 and 51 sides.