Learn and know **what is a regular pentagon**? Also know the main difference between *pentagon* and * regular pentagon*.

In geometry, we will get one topic called “polygons”. In polygons we get *pentagon.* First we will know what is a polygon? Afterwards we will know *pentagon* and then ** regular pentagon meanings**. The Polygon meaning goes like this “any kind of a closed figure which is made up of some line segments”. At least we need 3 line segments to get a closed figure and the figure so obtained is called as a triangle.

**What is a pentagon?**

** Pentagon** is explained as “a polygon made up of 5 line segments is called as a

*pentagon*”.

**Pentagon**has totally 5 angles and 5 sides and its has 5 diagonals. For finding the number of diagonals for a polygon we have a formula i.e. n (n-3)/2, where “n” means number of sides of a polygon.

Note:

Generally, students will think that* pentagon* shape is exactly like a house but it is not like that. Anything which is a closed figure and which has 5 line segments will be a** pentagon**.

**What is regular pentagon?**

We know * what is a pentagon*? Then what is

*mean by regular pentagon*. It means if a

*pentagon*has all the sides equal and also all the five angles are equal then the pentagon is called as a

*.*

**regular pentagon***Properties of regular pentagon:*

The sum of angles of a ** regular pentagon** is equal to 540 degrees (the formula used here is (n-2) x 180 degrees)

Each interior angle of *regular pentagon* is equal to 108 degrees (the formula used here is ratio of sum of angles and number of sides of a polygon)

Each exterior angle of ** regular pentagon** is equal to 72 degrees (the formula used here is 360 degrees/n).

Sum of all the exterior angles of a *pentagon* is equal to 360 degrees.

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