Area of annulus or ring (given radius of larger and smaller circles)

Formula

Area of annulus or ring (given radius of larger and smaller circles) formula
A
area of annulus
R
radius of larger circle
r
radius of smaller circle

Formula description

An annulus is a ring-shaped geometric figure, or more generally, a term used to name a ring-shaped object. Or, it is the area between two concentric circles.

Calculator (how to use calculator?)

Area of annulus or ring (given radius of larger and smaller circles) formula
R
r
A
Precision

Formula code

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References

  1. wikipedia: Annulus (mathematics).

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