Review what you know about the angles of polygons below.  

1. If the exterior angle of a polygon is $29°$, what is the interior angle?

   Hint (a):

   What is the relationship between the interior and exterior angles of a polygon?

2. If the interior angle of a polygon is $170°$, can it be a regular polygon? Why or why not?

   Hint (b):

   Refer to the Math Notes box in Lesson 8.1.4.

3. Find the sum of the interior angles of a regular $29$-gon.

   Answer (c):

   To calculate the sum of the interior angles of a polygon use $(n − 2)180°$.
   $\text{Sum of the interior angles in a 29-gon}=27\cdot180°=4860°$.