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
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