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## Credits

St Joseph's College (SJC), Bengaluru
Mona Gladys has created this Calculator and 1000+ more calculators!
Walchand College of Engineering (WCE), Sangli
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STEP 0: Pre-Calculation Summary
Formula Used
r = R-b
This formula uses 2 Variables
Variables Used
Radius of large circle - Radius of large circle is defied as the outer radius of the given polygon (Measured in Meter)
Breadth - Breadth is the measurement or extent of something from side to side. (Measured in Meter)
STEP 1: Convert Input(s) to Base Unit
Radius of large circle: 5 Meter --> 5 Meter No Conversion Required
Breadth: 2 Meter --> 2 Meter No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
r = R-b --> 5-2
Evaluating ... ...
r = 3
STEP 3: Convert Result to Output's Unit
3 Meter --> No Conversion Required
3 Meter <-- Radius of small circle
(Calculation completed in 00.016 seconds)

## < 4 Radius of the small circle of Annulus Calculators

Radius of small circle of annulus given large circle radius and area
Radius of small circle of annulus given large circle radius and perimeter
Radius of small circle of annulus given large circle radius and longest interval

r = R-b

## What is annulus?

In mathematics, an annulus (plural annuli or annuluses) is the region between two concentric circles. Informally, it is shaped like a ring or a hardware washer. The word "annulus" is borrowed from the Latin word anulus or annulus meaning 'little ring'. The adjectival form is annular (as in annular eclipse).The area of an annulus is the difference in the areas of the larger circle of radius R and the smaller one of radius r

### FAQ

How many ways are there to calculate Radius of small circle?
In this formula, Radius of small circle uses Radius of large circle and Breadth. We can use 4 other way(s) to calculate the same, which is/are as follows -