Shape names

In the past couple of days we've been talking a lot about shapes. So today I thought it would be good to talk about shapes and where their names come from.
3 sides - Triangle - Tri = 3
4 sides - qudrilateral - quad - 4 sides
5 sindes - Pentagon - penta = 5
6 sides - Hexagon - Hex = 6
7 sides - Heptagon
8 sides - Octagon
9 sides - nonagon
10 sides - decagon
Many times after 10 sides the shape will be refered to as an "n" gon where n is the number of sides.
Knowing the names of these shapes is important when identifying other shapes such as cubes, pentagonal prisms or a octagonal pyramid.

Just for reference here is a picture on the shape names.