Question 256574
we parents have to stick together...


for ANY regular polygon:

___ the sum of the EXTERIOR angles is 360º

___ interior and exterior angles are supplementary (add to 180º)



in this case,

___  there are 20 exterior angles, so each one is 18º (360 / 20)

___ the interior angles are supplements of 18º, so each one is 162º (180 - 18)