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3 years ago

HURRY PLEASE!! How many sides are there in a regular polygon which has 120 degrees in each of its angeles?

2 answers:

N76 [4]3 years ago

7 0

Number of angles = number of sides

180 - 120 = 60 (calculating the exterior angle)

360 / 60 = 6

There are 6 sides.

Hope this helps! :)

melomori [17]3 years ago

3 0

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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