Angles in Polygons

• What are interior angles?

  Angles inside the shape
• What is the sum of all the exterior angles in a polygon?

  360 degrees
• What is the formula to finding the value of each exterior angle in a polygon?

  360 / number of sides (n)
• What is the formula to finding the sum of interior angles in a polygon?

  180(n-2)
• What is the formula to finding the sum of a interior angle in a regular polygon?


  180(n-2) / n
• Individual interior angle value of a pentagon?

  108 degrees
• Individual interior angle value of an octagon?

  135 degrees
• Individual interior angle value of a decagon?

  144 degrees