In the previous post, I have discussed the standard equation of circle which is derived from distance formula.

The other equation of circle is known as **General.**

**Example**

To answer this question easily, you need your **completing square technique** (Read about the steps here)** **which many students dislike!

You notice in the step by step solution, the general equation is converted into a standard equation through the following steps:

- Arrange all
*x*terms and*y*terms together - Start completing square
- Simplify all constants
- Set equation into standard equation of circle

## General Equation to Standard Equation of Circle

**Radius = 5 and ****Centre of circe = (4, 1)
**

I hope you have a better understanding on equation of circle.