Center At The Origin, Radius 2v2

Center at the origin, radius 2√2

 

x² + y² = 8

explanation:

center (h,k) at origin: (0, 0)

radius:2√2

equation of circle when the is at origin:

x²+y²=r²

substitute r=2√2

x²+y²= (2√2)²

x²+y²= (4)(2)

x² + y² = 8