SOLUTION: the exterior angle of a regular polygon is 20 degree. How many sides does it have?

Algebra ->  Points-lines-and-rays -> SOLUTION: the exterior angle of a regular polygon is 20 degree. How many sides does it have?      Log On


   

Question 843494: the exterior angle of a regular polygon is 20 degree. How many sides does it have?
Answer by mathgenboy(3) About Me  (Show Source):
You can put this solution on YOUR website!
The formula is, an ext=360%2Fno+of+sides Then, n=360%2Fexteriorthat is, n=360%2F20 then n=18