Question

The measure of an interior angle of a regular polygon is 120°. What is the measure of each exterior angle? The polygon has how many sides?

Answer 1

60°, arms 6

Explanation:

let the total arms = n

total generated angles in a regular polygon is = (n-2)×180

now,

(n-2)×180 = 120 n

or, 180n - 360 =120n

or, 60n = 360

or, n = 6