**Nội dung bài viết**

A polygon which has seven sides are referred to as heptagon. Heptagon is a closed determine which have seven vertices. A heptagon is usually also called Septagon. A Heptagon has seven angles.

In Geometry, the form that’s bounded by minimal three straight traces or minimal three inside angles is named polygon. Few examples of polygons are as follows

You’re reading: what is a seven sided polygon called

- Triangle ( Is three sided polygon)
- Quadrilateral ( Is 4 sided polygon)
- Pentagon ( Is 5 sided polygon)
- Hexagon ( Is six sided polygon)
- Heptagon ( Is seven sided polygon)
- Octagon ( Is eight sided polygon)

Heptagon form

The form of heptagon is mainly depends upon its angles and diagonals. And, therefore heptagon is split into two elements;

- Common and Irregular Heptagon
- Convex and Concave Heptagon

Common and Irregular Heptagon

When all the perimeters and the angles of a heptagon are equal then the heptagon is claimed to be common. All the perimeters of a daily heptagon meets one another at an angle of 5π/7 radians or 128 4/7 levels.

When the perimeters and the angles of a heptagon are usually not equal then the heptagon is claimed to be irregular

### Convex and Concave Heptagon

Read: what is the scientific name for a snail

When all of the diagonals of a heptagon lie inside it, then it’s referred to as **convex heptagon**.

When a number of the diagonals of a heptagon lie exterior of the heptagon and a number of inside angles are greater than 180 levels, then the heptagon is claimed to be **concave heptagon.**

## Space of a Heptagon

For a daily heptagon having the aspect size “l”, then the formulation for the world of a heptagon is:

Space of a heptagon, A=7/4 l2 cot(π/7) Sq. items

Which is equal additionally to

Space of a Heptagon,A = 3.634l2 sq. items

## Perimeter of Heptagon

As we all know, all the perimeters “l” of a daily heptagon are of equal. So, the perimeter or circumference of a heptagon is given as,The perimeter of a heptagon,P = 7a items

Find out: what is the difference between love and crush

**For instance**; calculate the world and perimeter of a daily heptagon having aspect equals to six cm.

**Answer:**

The aspect of a heptagon,l = 6 cmAs we all know,

space of a heptagon, A = 3.634l2 sq. unitsPut l = 6 cm

A = 3.634 (6)2A = 3.634 (36)A = 130.824 cm2

As we all know that, perimeter of a heptagon, P = 7l unitsP = 7(6)P = 42 cm

Due to this fact, the perimeter of a heptagon is the same as 42 cm.