What is the name of a polygon that has 5 sides?

A polygon with 5 sides is called a pentagon. The term "pentagon" is derived from the Greek words "penta," meaning five, and "gon," meaning sides. This naming reflects its geometric properties. In a pentagon, you can identify it by the number of its edges, which play a significant role in determining its characteristics, such as the sum of its interior angles. Specifically, the sum of the interior angles in a pentagon is calculated using the formula (n-2) × 180° where n is the number of sides. Substituting 5 for n gives (5-2) × 180° = 3 × 180° = 540°. This fundamental aspect of pentagons is crucial for topics ranging from basic geometry to more advanced studies involving polygon properties. Understanding the definitions and properties associated with various polygons enhances comprehension of polygonal shapes as a whole.