Tag: irregular polygon Decagons - polygons with 10 sidesDodecagons - polygons with 12 sidesHendecagons - polygons with 11 sidesHeptagons - polygons with 7 sidesHexagons: properties, angles and symmetryNonagons - polygons with 9 sidesOctagons - polygons with 8 sidesPentagons - polygons with 5 sidesRegular polygons Join the GraphicMaths Newsletter Want article discussions, announcements, and discounts on GraphicMaths books and products? Join the newsletter: