Part I. Multiple Choice:
Directions: Choose the letter of the correct answer.
1. What is the equation of a circle with center at (0,0) and a radius of 11 units?
A. x2 + y2 = 11 B. x2+y2 = 121 C. x2 - y2 = 11 D. x2 - y2 = 121
2. Which of the following equation describes a circle on the coordinate plane with a center at
(2,-3) and a radius of 5 units?
A. (x-2)2+(y+3)2=252 B. (x+2)2+(y-3)2=5C. (x-3)2+(y+2)2=25 D. (x-2)2+(y+3)2=52
3. Find the equation of the circle with center at the origin and the radius is 5v3 units.
A. x2+y2 = 573 B. x2+y2 = 1073 C.x2+y2 = 253 D. x2 + y2 = 75​