Question

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

Answer 1

The number of sides of regular polygon is `4` and is a square.

Explanation:

Exterior angle (E) of a regular polygon is `E= 360/N`. Where N is the number of sides of polygon . `:.90=360/N or N= 360/90=4`
The number of sides of regular polygon is `4` and is a square.[Ans]