Question

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

Answer 1

x²+y² = 100

Explanation:

Equation for circle of radius r that is centered at (h,k):

(x-h)² + (y-k)² = r²

In your case, h=k=0 and r=10.

x²+y² = 100