1.
Find an equation of the circle whose center is at (-2, 4) and has radius 5.
A.
(
x
- 2)
2
+ (
y
+ 4)
2
= 5
B.
(
x
+ 2)
2
+ (
y
- 4)
2
= 5
C.
(
x
- 2)
2
+ (
y
+ 4)
2
= 25
D.
(
x
+ 2)
2
+ (
y
- 4)
2
= 25
Hint
2.
Find an equation of a circle if the endpoints of a diameter are at (-2, -3) and (1, 7).
A.
(
x
- 1)
2
+ (
y
- 7)
2
= 109
B.
C.
D.
(
x
+ 2)
2
+ (
y
+ 3)
2
= 109
Hint
3.
Find an equation for the graph below.
A.
(
x
- 4)
2
+ (
y
+ 1)
2
= 2
B.
(
x
+ 4)
2
+ (
y
- 1)
2
= 4
C.
(
x
+ 4)
2
+ (
y
- 1)
2
= 2
D.
(
x
- 4)
2
+ (
y
+ 1)
2
= 4
Hint
4.
What is equidistant to all of the points on a circle?
A.
radius
B.
tangent line
C.
center
D.
diameter
Hint
5.
Which of the following could be the center of a circle that is tangent to the lines
y
= 3 and
x
= –2?
A.
(-3, 1)
B.
(2, -1)
C.
(0, 0)
D.
(2, 1)
Hint