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# How many sides does a regular polygon have?

**The number of sides a regular polygon has is indicated by the name of the polygon.** For example, a pentagon has five sides, and an octagon has eight sides. The fewest number of sides a polygon can have is three, but there is no upper limit.

The name "polygon" comes from the Greek words "polus," meaning "many," and "gonia," meaning "corner" or "angle." To be classified as a regular polygon, all of the sides and angles must be congruent. A three-sided regular polygon is called an equilateral triangle. A four-sided regular polygon is called a square. The names of many-sided polygons can be constructed from Greek-derived number names, such as dodecagon for a 12-sided polygon or hexadecagon for a 17-sided polygon. However, past a certain number of sides, mathematicians normally use the abbreviation "n-gon," so a 25-sided polygon is called a 25-gon.

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Q:
## What is a list of some polygons?

A: A polygon is identified based on the number of its sides and vertices. Polygons are made of straight lines, called edges or sides, that meet in corners to ... Full Answer >Filed Under: -
Q:
## How do you calculate the area and perimeter of shapes?

A: Calculating the area of polygons requires specific formula, while calculating perimeters simply involves the addition of all sides of a polygon. Calculatin... Full Answer >Filed Under: -
Q:
## What is an irregular polygon?

A: An irregular polygon is any polygon where all sides and all interior angles are not equal. An polygon can be an irregular polygon regardless of how many si... Full Answer >Filed Under: -
Q:
## What is a polygon called where all sides are congruent?

A: A polygon that has all sides congruent is called a "regular polygon." Regular polygons must also have all angles congruent, which is a side effect of havin... Full Answer >Filed Under: