QuoteThis movie shows all the regular polygons that can be exactly drawn using the instruments of classical geometry: 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.