Question

Find the centre and radius of
x^2 + y^2 = 49

Answer 1

center:(0,0)

Radius:7

Explanation:

the equation of circle:

(x-h)^2+(y-k)^2=r^2

the point h and k are the center of the circle
(h,k) ———-> (0,0)

since r^2 =49

So, the radius will be the square root of that number

`r^(2) =49`

`\sqrt{r^(2) } =√(49)`

`r=7`