Question

what is a polygon? a type of curve a closed figure with straight sides a type of angle a three - dimensional shape

Explanation:

A polygon is defined as a closed figure with straight sides. It is a two - dimensional shape, not a curve (which is a continuous bending line), not a type of angle (which is a measure between two lines), and not a three - dimensional shape (which has depth in addition to length and width).

Answer:

A closed figure with straight sides