https://www.teacherspayteachers.com/Product/Activity-Sheet-on-Angle-Measures-in-Polygons-4288436

This activity sheet, containing 20 questions, has the 
students working with the sum of the angles in a polygon, sum of the exterior angles in a polygon, and the measure of a single angle in a regular polygon.

The students will

• develop the rule for the sum of the angles in a polygon;
• find the number of sides given the total degree measure of the interior angles;
• explain why a polygon cannot have a certain total number of 
  degrees;
• solve for a missing angle in a polygon;
• find the measure of one angle in a regular polygon; and
• solve for interior and/or exterior angles 
  on a polygon.

Answers are included for all exercises.