Question

How do you find the equation of a circle on a graph?

Answer 1

The equation of a circle centre at the origin:

The equation of a circle centre at the origin is given by

$x^2+y^2=r^2$

The equation of a circle centre at $(h,k)$:

When the center of a circle is not at the origin, then the equation of the circle is

${(x-h)}^2+{(y-k)}^2=r^2$

Where,

$(h,k)$is the center of the circle.

Hence, this way we can find the equation of a circle on a graph.