Question

Which of the following is the equation of a circle whose center is at the orgin and whose radius is square root 5?

1. x2+y2=squareroot 5
2. x2+y2=5
3. x2+y2=10
4. x2+y2=25

Answer 1

2

Answer 2

\[x ^{2}+y^2 = r^2\]

Answer 3

where r is the radius

Answer 4

so u have to find equation whoz radius is root 5

Answer 5

\[so r^2 =(\sqrt{5})^2 =5\]

Answer 6

so .......r^2 **

Answer 7

\[r^2 = (\sqrt{5})^2 =5\]

Answer 8

so you get x2+y2=5

Answer 9

Thanks you alot Been stuck on it for a while

Answer 10

you are welcome