Question

The circle below is centered at the origin and has a radius of 10. What is its
equation?

Answer 1

x^2 + y^2 = 100

Explanation:

The general form of the equation of a circle is

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

where (h,k) is the center and r is the radius

(x-0)^2+ (y-0)^2 = 10^2

x^2 + y^2 = 100