Math CentralQuandaries & Queries


Subject: Circle equation
Name: imLOST
Who are you: Student

Thanks in advance for the help,

I'll just tell the question as it is in front of me.

x^2+y^2=121 is the equation of the Circle C

(1) Write down the center and the radius of C.



Can you rewrite this equation in the form:

(x - a)2 + (y - b)2 = c2

where a, b, and c are constants (fixed numbers)? If so, then the center is at (a,b) and the radius is c.

I hope this helps,
Stephen La Rocque.

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