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

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

is the equation for a circle of radius r with center at (h,k)

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