Circles and Equations

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.