Question

A circle has a center at (8,2). The point is (3,7) is on the circle. What is the area of the circle, to the nearest tenth of a square unit?

A. 22.2 square units
B. 44.4 square units
C. 157.1 square units
D.314.2 square units

HELP PLEASE, and thanks.

Answer 1

The circle is

(x-8)^2 + (y-2)^2 = r^2
Plug in your point (3,7) and you have

(3-8)^2 + (7-2)^2 = r^2
Now that you have r^2, you know the area is just pi r^2.

If you get stuck, come back with your work.

Answer 2

I think it's 157.1 square units