s165151 s165151

08-05-2018
Mathematics

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The equation of a circle whose center is at (1,2) and radius is 5 is (x + 1)² + (y + 2)² = 5 (x - 1)² + (y - 2)² = 25 (x - 1)² - (y - 2)² = 25

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jdoe0001 jdoe0001

08-05-2018

[tex]\bf \textit{equation of a circle}\\\\ (x- h)^2+(y- k)^2= r^2 \qquad center~~(\stackrel{1}{ h},\stackrel{2}{ k})\qquad \qquad radius=\stackrel{5}{ r} \\\\\\\ (x-1)^2+(y-2)^2=5^2\implies (x-1)^2+(y-2)^2=25[/tex]

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