Question

How do you find the equation of the circle given center (0, 0), radius 7?

Answer 1

`x^2+y^2=49`

Explanation:

The equation of a circle is

`(x-h)^2 +(y-k)^2 = r^2`

Where `(h,k)` are the center of the circle and `r` is the radius

The center is `(0,0)` and `r = 7`

`(x-0)^2 +(y-0)^2 = 7^2`

`x^2+y^2=49`