Question

How do you identify the center and radius of the circle `x^2+y^2=49`?

Answer 1

Center is (0;0); Radius is 7

Explanation:

Since the equation of the circle also is the following:

`(x-x_0)^2+(y-y_0)^2=r^2`

where r is the radius and `(x_0;y_0)` is the center.

Then it is simple to see that the center is (0; 0) and the radius is 7