Apothem of Pentagon Formula

Pentagon is a polygon with 5 equal sides and with the angle of 108 degrees each. The apothem area of pentagon is calculated using the length of its side and the number of sides. This page provides the apothem of pentagon formula to calculate the apothem of pentagon. The apothem, also known as apo, of a pentagon is the line segment from the center to the midpoint of one of its sides. This apothem of pentagon formula helps you to solve your mathematical questions with ease.


Apothem of Pentagon = a / [2 tan(π / n)]


a = Side length
n = 5

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Substitute your values in this apothem of pentagon formula to know the result for the given pentagon with the given side length. Click on the apothem calculator under the related calculators section to verify your results in the calculator.

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