SOLUTION: What is the radius of the circle whose equation is x2 + y2 = 9? 3 , 9 OR 81?

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Question 316422: What is the radius of the circle whose equation is x2 + y2 = 9?
3 , 9 OR 81?
Answer by solver91311(24713) About Me  (Show Source):
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The equation of a circle with center and radius is:



John