The Names Of Shapes . . .

Here Are The Names Of All The Shapes From 3 Sides to 12 Sides :

3 sides = triangle
4 sides = square
5 sides = pentagon
6 sides = hexagon
7 sides = heptagon/septagon
8 sides = octagon
9 sides = nonegon
10 sides = decagon
11 sides = hendecagon
12 sides = dodecagon