Question

At a vertex of a regular polygon, exterior angle is 120°. Then the number of sides of this polygon is ______.

Options

• 3

• 4

• 5

• 6

Answer 1

At a vertex of a regular polygon, exterior angle is 120°. Then the number of sides of this polygon is 3.

Explanation:

The sum of all exterior angles of a regular polygon is always 360°. Given that each exterior angle measures 120°, the number of sides n is calculated as:

`n = \frac{360^\circ}{120^\circ} = 3`