# Octagon Calculator

In geometry, we will study about polygons. We have many kinds of polygons. Any geometry shape which is enclosed by its sides is called as polygon. A regular Octagon is eight sided polygon. The regular Octagon has eight equal sides and eight equal internal angles and eight equal external angles.

- Internal angle of a regular Octagon is 135°.
- External angle of a regular Octagon is 45°.
- Sum of internal angles of regular Octagon is 1050°.
- Sum of external angles of regular Octagon is 360°.

Octagon Calculator is a mathematical tool which will help us to calculate the area and perimeter of any given regular octagon.