U9 Polygon Names and Formulas

What do you call a polygon with 3 sides?

• Triangle

• Tripod

• Quadrilateral

• Hexagon

What do you call any polygon with 4 sides?

• Square

• Tripod

• Quadrilateral

• Hexagon

What do you call a polygon with 5 sides?

• Heptagon

• Pentagon

• Quadrilateral

• Hexagon

What do you call a polygon with 6 sides?

• Heptagon

• Pentagon

• Quadrilateral

• Hexagon

What do you call a polygon with 7 sides?

• Heptagon

• Pentagon

• Septagon

• Hexagon

What do you call a polygon with 8 sides?

• Heptagon

• Pentagon

• Octagon

• Hexagon

What do you call a polygon with 9 sides?

• Heptagon

• Nonagon

• Octagon

• Decagon

What do you call a polygon with 10 sides?

• Hendecagon

• Dadagon

• Dodecagon

• Decagon

What do you call a polygon with 12 sides?

• Hendecagon

• Dadagon

• Dodecagon

• Decagon

The SUM of the INTERIOR angle measurements in a polygon with n sides.

• 360

• (n-2)*180