In this section, the equation to find the degree measure of an exterior angle of a regular polygon will be discovered. The use of a calculator is helpful but not necessary.
In pentagon PENTA: ∠P and ∠1, form a linear pair and are supplementary.
Answer the following questions.
Polygon  Number of Angles 
Sum of Interior Angles (total degrees in interior angles) 
Number of Degrees in Each Interior Angle 
Number of Degrees in Each Exterior Angle 
Sum of Exterior Angles 
Triangle  
Quadrilateral  
Pentagon  
Hexagon  
Octagon  
ngon  is a polygon with n number of sides  Interactive button. Assistance may be required.
_____
180 −
(n minus 2) times 180 over n
(n − 2) × 180
n
or
360 over n
360
n

Use the figures above to assist in completing the chart above to discover the equation for the degree or measure of an exterior angle of a regular polygon.
Answer the following questions.