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Mathematics

Annulus Area Calculator

Area of a ring between two concentric circles

Annulus Area Calculator

Outer Radius (R)
Inner Radius (r)
Annulus = ring between two concentric circles. R must be greater than r.

An annulus is a ring-shaped region between two concentric circles. The annulus area calculator finds the area of this ring by subtracting the inner circle area from the outer circle area.

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