Quadrilaterals, pentagons, triangles, octagons, hexagons, decagons.
Triangles, squares, hexagons, and octagons all tessellate
A hexagon has six sides, and an octagon has eight. 3 hexagons and 3 octagons have 3*6 + 3*8 sides = 18 + 24 sides = 42 sides altogether.
Squares, circles, rectangles, trapeziums, hexagons, pentagons, octagons
Non-quadrilaterals contain triangles, circles, pentagons, octagons, hexagons, and stars.
any shape that is closed and has no round sides, triangles, squares, pentagons, hexagons, heptagons, octagons, nonagons...
Triangles or squares or hexagons. There are also mixtures, like octagons plus squares.
hex = 6, hept = 7, oct = 8, non or enne = 9.
Polygon means many sides. Octagon mean eight sides. Not all polygons are octagons, but all octagons are polygons. Examples of other polygons are triangles, squares, parallelograms, rhombuses, pentagons, hexagons, heptagons, decagons