Question #N588
In the xy-plane, a circle with center at (0, 0) passes through the point (4, 3). What is the radius of the circle?
A. 3
B. 4
C. 5
D. 7
Correct Answer is: C
The radius of the circle is the distance between the center of the circle and any point on the circle. We can use the distance formula to find this distance: $\sqrt{(4-0)^2 + (3-0)^2} = \sqrt{16 + 9} = \sqrt{25} = 5$.