A pentagon has five vertices, and each of these vertices is the ending point for two lines that form a side. **So, if you go around the perimeter of a pentagon, you’ll find ten lines that form five sides.**

However, it’s possible to walk along one line from one vertex to another on the same line and not travel the entire side of a pentagon. Mathematicians call this measurement an apothem. They use it to calculate the area of a pentagon.

There are also other ways to visualize a pentagon’s sides and apothems, such as connecting opposite corners on one side through lines extending past the shape’s edge.

The pentagon is the only polygon that has a prime number of sides. It has five sides.

## What Is a Pentagon?

A pentagon is a five-sided polygon. The word pentagon comes from the Greek words “pente” and “gonu,” which together mean “five angles.” There are many interesting facts about pentagons.

First, they are the only regular polygons with all sides of equal length and all interior angles of equal measure. Second, they also have no diagonals.

What about the Pentagon as an institution? That name comes from our very own Department of Defense, which began using the term in 1942 during World War II. They used it because of its association with Greek geometry and because it was conveniently short and easy to remember!

## What Has More Sides Than a Pentagon?

Many people think the answer to this question is the tesseract. After all, a tesseract has eight sides. Also, it looks like a cube with six sides. The only problem with that theory, however, is that a cube has eight corners, not six. So, what has more sides than a Pentagon? The hexahedron.

This shape has been gaining popularity to represent 3-D objects in 2-D drawings as a result of several technological advancements, including augmented reality and virtual reality systems.

Most people call the hexahedron a mathematical enigma. Mathematicians have been able to describe all five vertices using numbers and formulas, but they have been unable to do the same for its edges.

## What Are the Different Polygon Types?

Polygons are two-dimensional shapes that are formed by connecting lines. There are many types of polygons, all with different numbers of sides and angles. The most common types include:

### Regular Polygon

A regular polygon is one in which all sides and angles are the same length. Their regularity makes it possible to calculate the area of any regular polygon by knowing only its perimeter or the distance around its edges.

A regular polygon can be defined as a polygon constructed with compass and straightedge or one whose vertices can be connected in a sequence by alternatingly drawing straight lines between them. A regular polygon is made of equal sides, and all angles are equal.

### Convex Polygon

A convex polygon is a two-dimensional shape formed by line segments with adjacent sides. The segments are joined to form a closed figure with an interior angle at each vertex.

Convex polygons always have at least three sides, and all interior angles are less than 180 degrees.

A convex quadrilateral is a general term for a four-sided polygon that has all interior angles less than 180 degrees. A quadrilateral is a special case of a convex quadrilateral where all four sides are straight lines.

### Star Polygon

A star polygon is a geometric shape that has five or more points. Lines connect the points that make up the star at each end.

There are two classifications of star polygons: regular and irregular. Irregular star polygons can be further divided into triangles, pentagrams, and hexagrams.

### Self-Intersecting Polygon

A self-intersecting polygon is a kind of polygon in which at least one of the sides intersects with itself. This means that each side has at least one endpoint that is also an endpoint of another side.

The simplest possible self-intersecting polygon has two sides, each intersecting with both sides.

### Concave Polygon

A concave polygon is a polygon with at least a line segment that is not contained in the interior of the figure. It is also called an open polygon. The word “concave” comes from the Latin word “concavus,” which means “hollowed out.”

### Irregular Polygon

An irregular polygon is a polygon that does not have the same number of sides at every point. The most commonly studied type of irregular polygon is the triangle because it has three sides and three angles (each side has two angles).

Irregular polygons are important in computer graphics and mathematics; they are used to generate terrain and other natural phenomena.

## What Is the Different Pentagon Shapes You Can See in Everyday Life?

The pentagon is a common shape, but few people know what it looks like. It’s the Pentagon, and it can be found all around us.

Pentagons make up many things: The Pentagon is the name of the headquarters of the United States Department of Defense. It is also a five-sided shape used in military bases. It’s even part of the Pentagon food court. It’s also found in nature, such as starfish and honeycomb.

## How Do You Calculate the Circumference of a Pentagon?

The number of sides a polygon has affects how you calculate its circumference. A pentagon has FIVE sides, so to find the circumference, you just multiply 5 by Pi (3.14). The formula for finding the diameter of a pentagon is Diameter = 2 x Circumference.

If you want to find the area of a pentagon, it’s slightly more complicated. You multiply the height times width times 0.785398 and multiply that answer by pi/4.

## Is It Necessary for a Pentagon to Have Equal Sides?

A pentagon shape is not necessary to have equal sides. Although it has equal sides, there are other shapes with equal sides.

After much research, one can see many pentagons with different measures in the side lengths. There are some sides that vary from 2.5 inches to 7 inches. Therefore, it is evident that a pentagon does not necessarily to have equal sides.

## Final Thoughts

The Pentagon is a five-sided geometric shape. The pentagon is an example of a polygon with five sides and is the only regular polygon with these many sides.

There are many different types of pentagons. Learning more about pentagons will help you understand the different shapes around you.