Find Centre and Radius given the Equation of a Circle

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Examples, solutions, videos, activities and worksheets that are suitable for A Level Maths. How to find the center and radius of a circle, given an equation?

Finding the Centre and Radius of Circle : ExamSolutions
In this video you are shown how to find the centre and radius of a circle given the equation of a circle.

Q8 OCR 4721 Core Mathematics 1 January 2010
Find centre and radius of circle

Find the Radius, Center, and Equation of a Circle
This video provides a little background information and three examples of how to find the center and radius of a circle, given an equation. These problems require completing the square.

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