Equation of a Circle | Year 1 Pure | A Level Maths
The equation of a circle is a key topic in coordinate geometry and connects directly to completing the square. In this lesson you will learn how to use the form (x — a)^2 + (y — b)^2 = r^2, find the radius and centre from a given equation by completing the square, and recognise the alternative form x^2 + y^2 + 2fx + 2gy + c = 0. The skills developed here are used in problems on tangents, normals, chords and circumcircles.
Your A Level maths journey
We're with you every step of the way. Click here to find out more about the journey.
Only follow this arrow when you have covered the whole curriculum.
Lesson Video On Equation of a Circle
Follow the lesson video carefully with a pen and paper. By the end of it you should be comfortable with this topic. If you want a blank copy of this lesson to follow along, scroll down to the PDF viewer below and select “Student Notes Template” and download using the link at the top of the PDF viewer.
Lesson Resources For Equation of a Circle
Here you will find all of the PDF resources for the lesson on Equation of a Circle. Please choose from the dropdown menu below. You are able to download worksheets and notes templates to help you follow the video lesson. Mark schemes and solutions are not downloadable.
Finding this resource useful? Share it with a friend!