# Annulus Calculator

An annulus is a geometric shape that is formed by two concentric circles. The Annulus Calculator is an online tool that helps you calculate the area, circumference, and radii of an annulus. With any two known variables, you can calculate the other five unknowns.

## Concepts

An annulus is a two-dimensional shape that consists of two concentric circles. The outer circle has a larger radius than the inner circle. The area of an annulus is the difference between the area of the outer circle and the area of the inner circle. The circumference of an annulus is the sum of the circumference of the outer circle and the circumference of the inner circle.

## Formulae

The following formulae are used to calculate measures of an annulus:

/10

Education Quiz

1 / 10

Dr. Luke attends to emotionally disturbed students. Which service is being provided by Dr. Luke?

2 / 10

Which is the first country to have a public education system?

3 / 10

What is the study of plants called?

4 / 10

Which branch of mathematics deals with the study of shapes and sizes of objects?

5 / 10

The purpose of the evaluation is to make a judgment about educational...

6 / 10

What is the study of the physical, social, and cultural phenomena of a particular country or region called?

7 / 10

What is the study of history called?

8 / 10

What is the study of languages called?

9 / 10

What is the most widely spoken language in the world?

10 / 10

Which of the following is a type of visual art?

• Outer circumference of an annulus:ย `C1 = 2ฯr1`
• Inner circumference of an annulus:ย `C2 = 2ฯr2`
• Surface area of the space enclosed by the outer circle:ย `A1 = ฯr1^2`
• Surface area of the space enclosed by the inner circle:ย `A2 = ฯr2^2`
• Surface area of the annulus (the gray shaded area):ย `A0 = A1 - A2 = ฯ(r1^2 - r2^2)`

## Benefits

The Annulus Calculator provides a quick and easy way to calculate measures of an annulus. It can be used in various fields such as engineering, architecture, and mathematics. It saves time and effort by eliminating manual calculations.

## Interesting Facts

• The word โannulusโ comes from Latin and means โringโ.
• The area of an annulus can also be calculated using Greenโs theorem.
• The Annulus Calculator can be used to calculate measures of other shapes such as torus and circular sector.

## Use Cases

The Annulus Calculator can be used in various fields such as:

• Engineering: It can be used to calculate measures of annular seals, gaskets, and bearings.
• Architecture: It can be used to calculate measures of circular windows, doors, and skylights.
• Mathematics: It can be used to teach students about geometric shapes and their properties.

## References

• 3ย Kostov, Vasil. โOn the Area Formula for Annuli.โ Journal of Geometry 107, no. 1 (2016): 119-26. https://doi.org/10.1007/s00022-015-0297-y
One request?

Iโve put so much effort writing this blog post to provide value to you. Itโll be very helpful for me, if you consider sharing it on social media or with your friends/family. SHARING IS โฅ๏ธ

What do you think?
4
4
9
6
18
8

Want to save this article for later? Click the heart in the bottom right corner to save to your own articles box!