1.
Find the radius of a circle with the equation
x
2
+
y
2
+ 6
x
- 10
y
+ 28 = 0.
A.
6
B.
5
C.
D.
3
Hint
2.
What is an equation for a circle if the endpoints of a diameter are at (3, 4) and (-3, -2)?
A.
B.
C.
D.
Hint
3.
What is equidistant to all of the points on a circle?
A.
diameter
B.
center
C.
radius
D.
tangent line
Hint
4.
Write the equation
in standard form.
A.
B.
C.
D.
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.
(2, 1)
B.
(2, -1)
C.
(-3, 1)
D.
(0, 0)
Hint