equatonofcircley b y Center of circle x Radius of x est y Ch K circle if center is Get if we have to on if a know The circle Substitute 2 circumference radius 2,3 and 2 Cy 3 I 25 3 and we 5 equation it is on circle of want r point any is p2 Is point circle 3 1 whether location or in circle outside its with The point 35 left hand side I 225 i inside circle on circle Right H s is outside if given The and we endpoints of diameter find equation of circle two want to do we have to find The and The Inde radius for Two points x y midpoint 66,12 center and 2,4 with coordinates x2 42 12,11 distance between two 41571 points Feet ou Center 222,421 4 8 radius distance between Center and any of EE Fo 82 do i 20 equation I Cy 8 4 Ce 20 another form of equation of circle of IND y't a set Coefficients of oc equal otherwise by G and y it is not O must a circle Noted to apply The following rules Coefficient Joc coefficientf y C 3 referee be 2002 242 ex find Center and To apply rules must y both sides oo Oct c X y II rift Uy 22 by ay 22 0 Radius Coeff of scan of 2 11 0 I of