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.
A. 22.2 square units
B. 44.4 square units
C. 157.1 square units
D.314.2 square units
HELP PLEASE, and thanks.
Answers
Steve
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.
(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.
Chump
I think it's 157.1 square units