Question

What is the radius of the circle whose equation is x^2 + y^2 = 8?

Answer 1

Answer:

2√2

Step-by-step explanation:

To write the equation of a circle, use the formula $(x-h)^2+(y-k)^2 = r^2$ where the center of the circle is (h, k).

This means the equation is $x^2 + y^2 = 8$ has $r^2 = 8$. This means the radius is √8 = 2√2.

Answer 2

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THE ANSWER BE THIS: $2\sqrt{2}$

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