Question

What is the standard equation for a circle centered at the origin with radius R

Answer 1

r2=x2+y2

Explanation:

Answer 2

X^2+Y^2=r^2

generally, it would be (x-h)^2+(y-k)^2=r^2, h and k being the center point (h,k) but since these values are zero, you can get rid of them.

Hopefully this helped!