Question

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

Answer 1

I'm Lost.

Answer 2

so the equation is
x^2 + y^2 = (radius)^2

so with the given equation
(radius)^2 = 8
right?

Answer 3

Ye?

Answer 4

so square root both sides to find the radius
because
square root of (radius)^2 = (radius)

Answer 5

Radius = 8?

Answer 6

mmm square root

Answer 7

So 8^2?

Answer 8

x^2 + y^2 = 8^2?

Answer 9

(radius)^2 = 8

so
(radius) = square root of 8

Answer 10

So Radius is 4 because that's the square root of 8?

Answer 11

are you sure the square root of 8 is 4?

Answer 12

Well, Isin't it \[2\sqrt{2}\]?

Answer 13

that's right :)

Answer 14

So its x^2 + y^2 = \[2\]^2?

Answer 15

o, That didn't work

Answer 16

hmmm
I was gonna say that 2 sqrt(2) is the answer

Answer 17

O, Thats one of the answer Choices, I guess its Right

Answer 18

Ty!