X - h 2 y - k 2 r 2 x - 0 2 y - 0 2 2 2. X² y² r² Where ris the radius of the circle. There is no xy term in the equation of a circle.
X - p2 y - q2 r2 In the above equation r is the radius of the circle.
Ax2 2hxy by2 2gx2f y c 0. Basic Equation of a Circle Center at 00 A circle can be defined as the locus of all points that satisfy the equation x2 y2 r2 where xy are the coordinates of each point and r is the radius of the circle. For example suppose x - 2 2 y - 3 2 4 2 is an equation of a circle. Try a smart search to find answers to similar questions.