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Annulus Calculator

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r1 =   
r2 =  Units:
   
   

c1 = 
c2 = 
a0 = 
Annulus Diagram with Inner and Outer Radii
r1 = outer radius
r2 = inner radius
a0 = shaded area
a1 = area of circle of r1
a2 = area of circle of r2
c1 = outer circumference
c2 = inner circumference
Π = Pi

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