Question

What is the radius of the circle whose equation is x2 + y2 = 8?

Answer 1

the 2s are exponents

Answer 2

The standard form of circle is (X-A)^2 + (Y-B)^2=R^2
Here if the given equation is compared with the equation of circle, then we get that
R^2=8
Therefore R=Sq. root of 8 =\[\sqrt{8}=2\sqrt{2}\] is the radius :)

Answer 3

thank you!

Answer 4

You're welcome. :)