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:
The following figures are not heptagons:
There are 8 sides in this figure. So, it is not a heptagon.  
There are only 5 sides in this figure. So, it is not a heptagon. 
Angles of a 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. 
If the sides and angles of a heptagon are not equal, then it is irregular.

Real life examples of the heptagon
Fun facts about heptagon
