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OpenStudy (anonymous):
What is the equation of a circle whose center is at the origin and whose radius is 9? is it x^2+y^2=81?
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OpenStudy (lgbasallote):
\[\implies (x-0)^2 + (y-0)^2 = 9^2\implies x^2 + y^2 = 81\]
OpenStudy (anonymous):
so its rihgt ya?
OpenStudy (lgbasallote):
lol yeah
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