# Equations of a circle with given center and radius in different forms

This online calculator displays equations of a circle in standard form, in parametric form and in general form given center and radius

This online calculator displays equations of a circle in standard form, in parametric form and in general form given the center and radius . Formulas can be found below the calculator.

## Standard Equation of a Circle

The standard equation of a circle with the center at and radius is

## Parametric Equations of a Circle

The parametric equations of a circle with the center at and radius are

## General Equation of a Circle

The general equation of a circle with the center at and radius is

,

where

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