a =  
Length Units:  
Angle Units:  
n =  3  


r =  0  
R =  0  
A =  0  
P =  0  
x =  0  
y =  0 
n = number of sides, a = side lengths, R = circumradius
r = inradius (apothem), P = perimeter, A = area, y = exterior angle, x = interior angle
The polygon calculator to calculate properties of a regular polygon. When you enter any 1 variable of the polygon like side lengths and selet the Number of Sides. It can Calculates side length, inradius (apothem), circumradius, area and perimeter and so on.
For example, To polygon calculator, side lengths is 3, number of sides is 6:
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