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I need help in not sure how to write a standard equation :(

I need help in not sure how to write a standard equation :(-example-1
User HaiTH
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1 Answer

4 votes
look at your picture

notice the coordinates for the center of the circle, the x,y or h,k values
notice how long the radius is

thus
\bf \qquad \textit{equation of a circle} \\\\\\ (x-{{ h}})^2+(y-{{ k}})^2={{ r}}^2 \qquad center\ ({{ h}},{{ k}})\qquad radius={{ r}}
User Digi
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