Respuesta :

exterior angle is always 360
[tex] \frac{360}{17} = 21.1764705882 [/tex]
hence 21.2 (3s.f.)
The interior angle is a regular polygon is equal to 180-360/n, where n is the number of sides.
For a 17-sided regular polygon, 180-360/n is approximately 158.824 degrees.