## Circles

The equation of a circle with centreand radiusisor

This equation is a consequence of Pythagoras theorem and is illustrated below.

The equation of a circle is a quadratic equation because of theandterms.

The equation of a circle with centreand radiusisor

This equation is a consequence of Pythagoras theorem and is illustrated below.

The equation of a circle is a quadratic equation because of theandterms.