Octagon Area Calculator
From Side Length
From Apothem
From Perimeter
Formula
A = 2(1+sqrt(2))*s^2 | P = 8s | apothem = (s/2)(1+sqrt(2))
Frequently Asked Questions
How do you calculate the area of a regular octagon?
Area = 2(1 + sqrt(2)) * s^2, where s is the side length. This comes from dividing the octagon into triangles and rectangles.
What is the interior angle of a regular octagon?
Each interior angle of a regular octagon is 135 degrees. The sum of all interior angles is 1080 degrees.
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