Q4 of 59 Page 203

Let's write by calculation the number of sides of a regular polygon where measurement of each angle is 120°.

Given: Each angle = 120°

We know that, number of angles of a polygon = number of sides


And we know that, the sum of exterior angles of a polygon = 360°


∵, each angle = 120°



= 3


∴, Number of sides = 3


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