# Thread: Area of a Regular Polygon without using Trigonometry

1. ## Area of a Regular Polygon without using Trigonometry

Can anyone give me some direction on how to find the side length or the area of a regular polygon if I know the apothem or the radius, without using Trigonometry? I need something that works for any amount of sides. Any help would be greatly appreciated!

2. ## Re: Area of a Regular Polygon without using Trigonometry

best I can do w/o trig is $A = \dfrac{n s a}{2}$ where

$n =$number of sides

$a =$apothem length

$s =$side length

To get a side in terms of the apothem or radius you're going to need a tiny bit of trig.