Regular polygon Calculator tool

To import the Edge number and Length of side, click "Calculator".

Significant number number >>>

the above graph is are octagon

The outer blue circle is called The outer circle The red color circle is called the inner circle.

Angle EAB is a regular octagon. one Inner Angle

one Outer Angle It be tantamount to Center Angle ACB.

AC is Peripheral circle radius.

CD is Inner circle radius.