If you meant a dodecagon, you can find out easily.
The equation for the total measure of the inner angles of a shape is:
(n - 2)180° = x where n is the number of sides.
Since a dodecagon has 12 sides, n = 12.
[tex](n-2)180=x\\
(12-2)180=x\\
(10)180=x\\[/tex]
x = 1800°
