2. Sum of Interior Angles
• (n-2)180
• Think of it this way, you know a triangle’s
is 180 and it has 3 sides…so you must
subtract 2 from the number of sides to
multiply to get only 180
• If you want to know each interior angle in
a regular polygon, then divide that answer
by the number of sides…which matches
the number of angles (n-2)180/n
3. Exterior Angles
• The sum of the exterior angles is
360…no matter how many sides
• Each exterior angle is found by
dividing 360 by how many sides
(angles) in the figure 360/n
