Area and Dimensions of a Circular Ring Sector

Please enter a, r or d and R or D.
a
r
d
R
D


Area =  

Formulas:

A = Area
a = angle, in degrees
R = Outer Radius
D = Outer Diameter
r = Inner Radius
d = Inner Diameter
A = ((a * p) ÷ 360) * (R2 - r2)
A = 0.00873 * a * (R2 - r2)
A = ((a * p) ÷ (4 * 360)) * (D2 - d2)
A = 0.00218 * a * (D2 - d2)

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