Common calculations related to disk (wheel, circle). Calculate circle's area or radius or circumference.

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This online calculator is currently under heavy development. It may or it may NOT work correctly.

You CAN try to use it. You CAN even get the proper results.

However, please VERIFY all results on your own, as the level of completion of this item is NOT CONFIRMED.

Feel free to send any ideas and comments !

Choose a scenario that best fits your needs |

Area (S) | => | |

Circumference (L) | => | |

Radius (R) | <= |

Radius (R) | Show source$1\ \left[m\right]$ |

Used formula | Show source$S = pi * R^2$ | |||||||||||||

Result | Show source$\pi$ | |||||||||||||

Numerical result | Show source$3.141592653589793\ \left[m^2\right]$ | |||||||||||||

Result step by step |
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Numerical result step by step |
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Units normalization | Show source$3.141592653589793\ \left[m^2\right]$ |

Used formula | Show source$L = 2pi * R$ | ||||||||||

Result | Show source$2~\pi$ | ||||||||||

Numerical result | Show source$6.2832\ \left[m\right]$ | ||||||||||

Result step by step |
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Numerical result step by step |
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Units normalization | Show source$6.2832\ \left[m\right]$ |

- The
**disk**(wheel) is a set of points on the plane whose distance from**the center of the disk**is less or equal to its**radius**. - The disk is a
**flat figure**. - There are two parameters defining the disk (wheel) in the unique way:
**center of the disk**and its**radius**. - The area of the disk depends on its radius and can be computed using formula:

$S = \pi R^2$where:

**S**- disk area,

**R**- radius,

**$\pi$**- constant, that approximates 3.14.

- Circumference of the disk with radius R is:

$L = 2\pi R$where:

**L**- circumference of disk or circle,

**R**- radius,

**$\pi$**- constant, that approximates 3.14.

- For each disk (wheel) the ratio of its circumference to diameter is constant. This constant is denoted by greek leter π and is approximately 3.14.

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