The equation of circle is:

Centre: (a,b)

Radius: r

## Memory Tip

- The equation is actually
!!!**Pythagoras’ Theorem** - Please take note of the
**minus sign “(x-a), (y-b)”**

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# Equation of Circle

## Memory Tip

The equation of circle is:

Centre: (a,b)

Radius: r

- The equation is actually
!!!**Pythagoras’ Theorem** - Please take note of the
**minus sign “(x-a), (y-b)”**

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