HURRY PLEASE!! How many sides are there in a regular polygon which has 120 degrees in each of its angeles?
2 answers:
Number of angles = number of sides
180 - 120 = 60 (calculating the exterior angle)
360 / 60 = 6
There are 6 sides.
Hope this helps! :)
Formula for internal angles of a n gon is (n-2)180/n
so it has 120 on each of the angles
120=(n-2)180/n
times both sides by n
120n=180n-360
minus 180n both sides
-60n=-360
divide both sides by -60
n=6
6 sides
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