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## Question:

What is the radius of the circle whose equation is x2 + y2 = 9?

3

9

81

## Answer:

The center-radius form of the circle equationis in the format (x – h)2 + (y – k)2 = r2, with the center being at the point (h, k) and the radius being “r”. **Therefore the radius of the circle with the given equation would be ****√9 or 3, first option.** Hope this answers the question.

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