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distance formula

A-Math: Standard Equation of Circle - Derived from Distance Formula

I notice many students had a hard time making sense of the standard equation of circle which is nothing new! The standard equation of circle is simply the Distance formula learnt in Coordinate Geometry in E-Math and A-Math.

Diagram for Standard Eqn of Circle
Diagram for Standard Eqn of Circle

Standard equation of circle:

standard-eqn-circle

Example:

standard-eqn-circle-example

Test Yourself:

To ensure you have understood the standard equation of circle, attempt the question below by selecting the correct option and leave your answer in the comments section.

standard-eqn-circle-example2

In my future post, I'm going to discuss the other type of equation of circle: General equation of circle.

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Filed Under: A-Maths Tuition Tagged With: coordinate geometry, distance formula, general equation of circle, standard equation of circle

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