Heptagon - Definition with Examples

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What is Heptagon?

Heptagon is a polygon ( a closed shape made up of line segments) made up of 7 sides and 7 angles. The word heptagon is made up of two words, hepta meaning seven and gon meaning sides.

There are 14 diagonals in a heptagon and in the given heptagon, the blue line segments represent the diagonals.



Some more examples of heptagon are given below:

example of heptagon 1 example of heptagon 2


The following figures are not heptagons:


non-example of heptagon 1  There are 8 sides in this figure. So, it is not a heptagon.
non-example of heptagon 2  There are only 5 sides in this figure. So, it is not a heptagon.


Angles of a Heptagon:

angles of heptagon


A heptagon consists of 7 angles, and the sum of these angles is 900°.

∠1 + ∠2 + ∠3 + ∠4 + ∠5 + ∠6 + ∠7 = 900o

Regular heptagon: 

Irregular heptagon: 

If all sides and all angles of a heptagon are equal, then it is known as a regular heptagon. Each angle of the regular heptagon is 128.57 degrees.

regular heptagon

If the sides and angles of a heptagon are not equal, then it is irregular.


irregular heptagon


Real life examples of the heptagon 

heptagon shapes around us

  Fun facts about heptagon

  • A heptagon is also known as a septagon. Sept of septagon is a Latin-derived numerical prefix and, hepta is a Greek-derived numerical prefix which means seven and gon means angle.


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