# Circle Calculator

The Circle Calculator is a tool that allows you to calculate various properties of a circle given one known value. It is commonly used in mathematics, engineering, and other fields that require calculations involving circles.

## Concepts

### Circle

A circle is a two-dimensional geometric shape that consists of all points in a plane that are at a given distance from a given point, the center. The distance between any point of the circle and the center is called the radius.

## Formulae

The Circle Calculator uses the following standard formulas for a circle:

### Area

The area of a circle is given by the formula:

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``````A = ฯr^2
``````

whereย `r`ย is the radius of the circle.

### Circumference

The circumference of a circle is given by the formula:

``````C = 2ฯr
``````

whereย `r`ย is the radius of the circle.

### Diameter

The diameter of a circle is twice the radius. Therefore, it is given by the formula:

``````D = 2r
``````

## Benefits

The Circle Calculator has several benefits:

• Accuracy: The calculator applies correct formulas for each calculation.
• Versatility: The calculator outputs area, circumference, and diameter from a single input.
• Consistency: The calculator standardizes calculations between problems.
• Accessibility: The calculator removes mental math barriers to multi-property calculation.
• Applications: The calculator supports dimensions across scales for design, construction, etc.

## Interesting Facts

• A circle is one of the most basic geometric shapes and can be found in many everyday objects such as wheels, plates, and coins.
• The area of a circle was first calculated by Archimedes in ancient Greece.
• The formula for calculating the area of a circle was first written down by Euclid in his book โElementsโ.
• The circumference of a circle can be used to calculate its perimeter in geometry.
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