I would appreciate if someone could answer this:)

The clayton family’s pool has vertices at the coordinates (0, 2), (0, 5), (2, 5), (2, 6), (5, 6), (5, 1), (2, 1), and (2, 2). if each grid square has an area of 9 square feet, what is the area of the pool?

Does the point (1, sqrt 7) lie on circle shown.

The measure of angle 0 is 600 degrees