Question

Which of the following objects is not a polygon?

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

A polygon is a closed figure that has a finite number of straight sides.

Option (A):
All the sides are made of straight lines.

Option (B):

All the sides are made of straight lines.

Option (C):

All the sides are made of straight lines.

Option (D):

The above figure is closed by straight lines on two sides, while one side is closed by a curve. Hence, this object is not a polygon.