About Circles and Equations
Finding the center and radius from a circle equation .... all clearly explained. A power learning aid combines Coaching Calculator, Practice and Guide to help students master finding the center and radius of a circle by...
Finding the center and radius from a circle equation .... all clearly explained.
A power learning aid combines Coaching Calculator, Practice and Guide to help students master finding the center and radius of a circle by completing the square.
Develop skills with the Coaching Calculator as you find the center and radius of a circle step by step,
- Taking constant term to right hand side
- Grouping x-related and y-related terms
- Completing the squares
- Writing in center-radius form
or go straight to a particular step.
Check your progress with Practice as it presents you with circle equations from simple to more difficult.
Reference the Guide as it features step-by-step examples of circle equations where the coefficient of x² is one and not equal to one.
Applications include finding the equation of a tangent line at a a given point on a circle and determining if a given point is inside a circle.
Sep 17, 2025
Version 7.4
This version is iOS 18 compatible and contains minor bug fixes.
Previous Versions
Here you can find the changelog of Circles and Equations since it was posted on our website on 2016-10-30 08:11:55.
The latest version is 7.4 and it was updated on 2026-06-12 13:13:52. See below the changes in each version.
Circles and Equations version 7.4
Updated At: 2025-09-17
Changes: Sep 17, 2025
Version 7.4
This version is iOS 18 compatible and contains minor bug fixes.
Circles and Equations version 6.0
Updated At: 2008-10-16
Disclaimer
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