Question

The equation of a circle is x2 + y2 = 56.25. Find the radius of the circle?

Answer 1

r = 7.5

Explanation:

Circle equation:
`(x - h)^2 + (y - k)^2 = r^2`

Since we are already give r², we simply just take the square root of 56.25, and we should get 7.5 as our final answer!