Circle Equations
Circle Equations
Standard forms of equation of a circle
Standard forms of equation of a circle
General equation of a circle:
The general equation of a circle is x2 + y2 + 2gx + 2fy + c = 0 where g, f, c are constant.
Central form of equation of a circle:
The equation of a circle having centre (h, k) and radius r is (x – h)2 + (y – k)2 = r2
If the centre is origin, then the equation of the circle is x2 + y2 = r2
