The pentagon is derived from the Greek word Pentagonos, Which means Five-angled. A pentagon is a geometrical Shape. Penta denotes Five, and gon indicates angle.

Pentagon is a Type of Polygon, sum of all interior angles for a regular pentagon is 540 degrees. In short, a two-dimensional shape composed of straight lines and interior angles is known as a polygon.

A pentagon is a Polygon with Five sides and Five angles. All the sides of a pentagon meet with each other. Therefore,** The number of sides of a pentagon= 5**

**In geometry, We study different types of shapes. There are some examples of Polygons-**

- Triangle (three-sided Polygon)
- Quadrilateral (four-sided Polygon)
- Pentagon (five-sided Polygon)
- Hexagon (six-sided Polygon)
- Heptagon (seven-sided Polygon)

In this article, we learn on – How many sides does a pentagon have? We have added all the information on the pentagon that you should know about, so read carefully till the end.

## Pentagon Properties

There are some essential properties of the pentagon as follows-

- The total sum of the interior angle of a rectangular pentagon is 540 degrees.
- The equilateral Pentagon has five equal sides.
- If all the sides and all the angles are equal measures, then it is defined as a Regular pentagon. Otherwise, it is an irregular pentagon.
- In the pentagon, the sum of the angles is equal to 540 degrees.
- Regular pentagon, each interior angle measure 108 degrees, exterior angle measure 72 degrees

## Example

For better understanding, Let’s Focus on the Example-

**Question: **Find the area and perimeter of a regular pentagon whose side is 5 cm, and apothem length is 6 cm.

**Solution:**

Given:

The side of a pentagon, a = 5 cm

Apothem Length = 6 cm

We know that

The area of a pentagon, **A = (5/2) ×Side Length ×Apothem square units**

Substitute side = 5 cm, Apothem = 6 cm in formula,

A = (5/2) × 5 × 6

A = 5 × 5 × 3

A = 75

Therefore, the area of a pentagon is 75 cm2

The perimeter of a pentagon, P = 5a units

P = 5(5)

P = 25 cm

## Frequently Asked Questions

**How many sides does a pentagon have?**

A pentagon is a geometrical Shape. Penta denotes Five, and gon indicates angle. Thus, a pentagon has a shape that has five sides and five angles.

**How many types of pentagons?**

There are eight types of pentagons. Simple pentagon, Complex pentagon, Regular pentagon, Cyclic Pentagon, Convex pentagon, Concave pentagon, Irregular pentagon, Regular pentagon

**How many types of Polygon?**

In the above, we have already added the type of Polygon.