Question #N201
A circle with center (5, 3) passes through the point (1, 3). What is the radius of the circle?
A. 2
B. 3
C. 4
D. 5
Correct Answer is: C
The radius of a circle is the distance between the center of the circle and any point on the circle. The distance between (5, 3) and (1, 3) is 5 - 1 = 4. Therefore, the radius of the circle is 4.