# How do you find the area of circle  x^2 + y^2 = 25?

$25 \pi$
The center of the circle is at (0,0) and, when x = 0, the circle points are at $y = - 5$ and $y = 5$. So, the radius of the circle is r = 5.
The area of a circle is given by $\pi {r}^{2}$. So, substituting $r = 5$, one gets the answer: $25 \pi$.