CIRCLES | DIFFERENT FORMS OF CIRCLE, INTRODUCTION, SOME PARTICULAR CASES FOR EQUATION OF THE CIRCLE., SOME PARTICULAR CASES, GENERAL EQUATION OF CIRCLE | Standard equation of circle, General Equation of Circle When the circle passes through the origin., General Equation of Circle When the circle touch x axis and y axis ., General Equation of Circle When the circle touches both the axis., Important points to remember, Find the Equation; radius; center of the circle and its x intercept and y intercept ?, Theorem:- Prove that the equation `x^2+y^2+2gx+2fy+c=0` always represent a circle whose centre is `(-g;-f)` and radius `sqrt(g^2+f^2-c)`, Diameter form of the circle, Parametric form of circle, Equation of a circle passing through 3 points, Equation of a circle with equation of tangent and radius