The Cartesian circle equation

In this playlist I look at finding the circle equation in Cartesian form which is based around using Pythagoras’ theorem. From this I take you through an alternative form of the equation and look at geometrical properties to establish a method of finding the equation of a tangent and equation of a circle passing through three points.

There are also some past exam questions to try which will hopefully supplement your revision.

The standard Cartesian circle equation

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Alternative form

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Geometrical properties of circles

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Equation of a tangent

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Equation of a circle passing through three points

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