Ending Questions
Are you noticing a pattern between the number of sides of a polygon, the number of triangles you can create by drawing diagonals and the sum of the interior angles?
Using your answers from your chart, predict the sum of the interior angles of the following shapes:
Heptagon: 7 sides
Octagon: 8 sides
Nonagon: 9 sides.
If you had to write a formula to find the sum of interior angles in a polygon, what formula could you write?
If all the angles were the same, how could you find just one of the angle measures?
Can you write a formula to find this number? What would you write?