Posted by Ryan on Thursday, March 1, 2012 at 11:38pm.
x^2+y^2=36 is a circle. How can you tell without actually plotting? Where is the center?

math  Bosnian, Friday, March 2, 2012 at 2:20am
The center placed in the point (0,0)
radius = sqrt ( 36 ) = 6

math  Steve, Friday, March 2, 2012 at 2:20pm
ya gotta know that
(xh)^2 + (yk)^2 = r^2
is the equation for a circle of radius r with center at (h,k)
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