DECAGON

• 2-D figure

• Figure with 1440 degrees

• If it's regular, each of its angles is 144 degrees

• It has 10 angles

• Plane figure

• Shape whose internal angles are all 144

• Shape with ten sides

• Ten-sided figure

• Twice-as-good Defense Department?

• A polygon with 10 sides and 10 angles

Десятикутник