dodecagon
=A shape with 12 sides is a Dodecagon.=
The shape with 12 side is called DoDeragon, the degree for the shape is 140 degree.... -I'm guessing...sorry if it wrong....
Dodecagon is the name for the regular 12 sided polygon, meaning that all its side lengths and angles are the same. Not sure if there is a name for a general 12 sided 2d shape.
it means one side of the shape is 18 and the other side is 12
A 7 sided shape is a heptagon
Decagon
pentadecahedron
An octagon.
Isasakaitateragon
pentagon
hexagon
heptagon