A circle has circumference = 18. Calculate Area, Circumference, Radius, Diameter

A circle has an area of 18. Calculate the radius, diameter, and circumference.

A = πr

Rearranging the equation, we get:

r^{2} = | A |

π |

r = | √A |

√π |

r = | √18 |

√3.8 |

r = | 4.3 |

5 |

r =

d = 2r

d = 2 * 2.6

d =

C = 2πr

C = 2π * 2.6

C =

Click our circle equation calculator to see the equation of a circle with radius = 2.6 with center at (0,0)