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# Need Some Help

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A circle is centered at (11, −9)  and has a radius of 12.

What is the equation of the circle?

Mar 28, 2018

#1
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A circle is centered at (11, −9)  and has a radius of 12.

What is the equation of the circle?

The equation of a circle is

$$(x-h)^2+(y-k)^2=r^2\\where\;\;\\ (h,k) \text{ is the centre and r is the radius}$$

This should be ample info for you to do it yourself.  Just do the substitutions.

Mar 28, 2018