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    How do I find the radius in number 11(a)(ii)???
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    (Original post by Vidya Das)
    How do I find the radius in number 11(a)(ii)???
    Rearrange the circle equation into the form (x - a)^2 + (y - b)^2 = c. (a, b) will be the coordinates of the centre of the circle you found in 11(a)(i). c = r^2.
 
 
 

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