SOLUTION: how do you find the measurements of the angles in a 20-gon? My daughter's math book is very unspecific

Question 256574: how do you find the measurements of the angles in a 20-gon? My daughter's math book is very unspecific
Found 2 solutions by checkley77, scott8148:
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
THE MEASUREMENTS OF THE INTERNAL ANGLES OF A 20-GON IS:
(N-2)180=(20-2)180=18*180=3,240 DEGREES.
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
we parents have to stick together...

for ANY regular polygon:
___ the sum of the EXTERIOR angles is 360�
___ interior and exterior angles are supplementary (add to 180�)

in this case,
___ there are 20 exterior angles, so each one is 18� (360 / 20)
___ the interior angles are supplements of 18�, so each one is 162� (180 - 18)
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