What is the minimum number of sides a polygon can have?

A polygon is defined as a closed figure composed of straight line segments connected end to end. For a shape to meet the criteria of a polygon, it must have at least three sides. This is because with one side, the figure is merely a line, and with two sides, the shape cannot close itself to form a complete shape.

The smallest polygon is known as a triangle, which has three sides. Triangles possess the necessary attributes of a polygon, such as having three vertices and three edges that create a closed figure. Each side must be a straight line segment, reinforcing the requirement for a minimum of three sides to create a polygonal shape.

Understanding these geometric properties is fundamental in geometry, particularly when distinguishing between different types of shapes and their characteristics.