
The number of diagonals in a polygon = 1/2 N(N3), where N is the number of sides of a polygon
Example: How many diagonals does a hexagon have?
Directions: Answer the following questions. Also draw draw and calculate how many diagonals does triangle, rectangle, square, parallelogram, trapezoid, rhombus, kite, pentagon, hexagon, heptagon, octagon, nonagon and decagon have. 