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An annulus has large radius 12 and small radius 5

<-- Enter Large Radius
<-- Enter Small Radius
  
An annulus has a large radius (R) of 12 and a small radius (r) of 5, calculate the Area (A) and equation of the annulus

Calculate Area (A):

A = π(R2 - r2)
A = π(122 - 52)
A = π(144 - 25)
A = 119π ~ 373.8495

Calculate Equation (assume radius of (0,0):

25 ≤ x2 + y2 ≤ 144




What is the Answer?

25 ≤ x2 + y2 ≤ 144

How does the Annulus Calculator work?

Calculates the area of an annulus and the equation of the annulus using the radius of the large and small concentric circles.
This calculator has 2 inputs.

What 1 formula is used for the Annulus Calculator?

  1. A = π(R2 - r2)

For more math formulas, check out our Formula Dossier

What 3 concepts are covered in the Annulus Calculator?

annulus
A ring shaped object, bounded by two concentric circles
circle
the set of all points in the plane that are a fixed distance from a fixed point
radius
Distance from the center of a circle to the edge
C/2π

Example calculations for the Annulus Calculator

  1. An annulus has an outer radius of 12 and an inner radius of 5

Annulus Calculator Video


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