Triangle

Quadrilateral

Pentagon

Hexagon

Heptagon

Octagon

Nonagon

Decagon

Hendecagon

Dodecagon

Quadrilateral

Pentagon

Hexagon

Heptagon

Octagon

Nonagon

Decagon

Hendecagon

Dodecagon

Choose a type of polygon:

Regular

Irregular

Regular

Irregular

Enter the sum of the internal angles for the polygon.

Use S = (n - 2)x180 where n is the number of sides.

Total Sum =

Use S = (n - 2)x180 where n is the number of sides.

Total Sum =