Octagon

Definitions:
  • a: Edge Length
  • U: Perimeter
  • A: Area
U a

Perimeter of an Octagon

The perimeter U is the length of all 8 sides.

\(U=8*a\)
U = Perimeter
a = Edge Length
\(a=U/8\)
a = Edge Length
U = Perimeter

A a

Area of an Octagon

The region inside an ocatagon.

\(A=2*(1+sqrt(2))*a^2\)
A = Area
a = Edge Length
\(a=sqrt(A/(2*(1+sqrt(2))))\)
a = Edge Length
A = Area