Check http://en.wikipedia.org/wiki/Dodecagon for a 23 step animation using a compass and a straight edge.
duodecagon duodecagon
A duodecagon has twelve sides and twelve corners. A duodecagon is usually called a dodecagon.
A duodecagon has 12 sides and 12 angles. Like a Dodecagon.
Not sure about a duodecagon, but a regular dodecagon has 12 axes of symmetry.
Providing that it is a regular duodecagon each exterior angle measures 30 degrees
duodecagon
Duodecagon <--wrong... a duodecagon is a 12-sided polygon. icosagon is a 20 sided polygon.
12
12
54
12
It's called a dodecagon or a duodecagon.