Pentagon Area Calculator
From Side Length
From Apothem
From Area
Formula
A = (sqrt(25+10*sqrt(5))/4) * s^2 | P = 5s | apothem = s/(2*tan(pi/5))
Frequently Asked Questions
How do you calculate the area of a regular pentagon?
Area = (sqrt(25 + 10*sqrt(5)) / 4) * s^2, where s is the side length. Alternatively, Area = 0.5 * perimeter * apothem.
What is the interior angle of a regular pentagon?
Each interior angle of a regular pentagon is 108 degrees. The sum of all interior angles is 540 degrees.
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