Basic Polygon names and formulas

Polygon Formulas -

Area of regualr polygon -
1/2 x (apothem*) x (perimeter)

Sum of the interior angles of a polygon - (number of sides -2) x (180)

Number of diagonals in a polygon- (1/2 # of sides) x (number of sides)

All the exterior angles of every polygon add up to 360 degrees