How many sides does a regular polygon have if one exterior angle is 90 degrees?

Solution:

Given, one exterior angle is 90 degrees.

Each exterior angle will be 180 - 90 = 90 degrees.

We know the sum of exterior angles is 360 degrees.

So, number of sides = 360/90 = 4

Therefore, the regular polygon has 4 sides.

How many sides does a regular polygon have if one exterior angle is 90 degrees?

Summary:

A regular polygon will have 4 sides if each exterior angle measures 90 degrees.