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

Dec 28, 2016

Center is (0;0); Radius is 7

#### Explanation:

Since the equation of the circle also is the following:

${\left(x - {x}_{0}\right)}^{2} + {\left(y - {y}_{0}\right)}^{2} = {r}^{2}$

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