What do you call a polygon with five sides?

A polygon with five sides is called a pentagon. The name comes from the Greek words "penta," meaning five, and "gon," meaning angle. Therefore, a pentagon has five angles corresponding to its five sides. This means that if you were to draw a shape with five straight edges, you would have a pentagon.

In geometry, understanding the specific types of polygons is important, as their properties—such as the sum of their interior angles—vary based on the number of sides. For a pentagon, the sum of the interior angles is 540 degrees. Each type of polygon plays a significant role in various mathematical concepts, and knowing the terminology is essential for clear communication and understanding in geometry.