Question

How do you write an equation of a circle?

Answer 1

Explanation:

The equation of a circle is:

(x-h)² + (y-k)² = r² where the center is at (h,k) and r is the radius.

so if you need the equation of a circle centered at (-3,5) and a radius of 7 would be:

(x+3)² + (y-5) = 49