1.
Refer to circle
C
. Find the value of
x
.
A.
13
B.
C.
D.
Hint
2.
A.
30
B.
90
C.
45
D.
60
Hint
3.
A.
7
B.
4
C.
6
D.
5
Hint
4.
is tangent to circle
S
.
LT
= _______.
A.
18
B.
12
C.
D.
Hint
5.
In the figure,
and
are tangent to circle
V
at the points
A
and
E
, respectively, and
X
is the midpoint of
. If the radius of circle
V
is 5,
AE
= 8, and
XD
=
, find
AD
.
A.
B.
3
C.
D.
Hint
and 
are tangent to circle V at the points A and E, respectively, and X is the midpoint of 
. If the radius of circle V is 5, AE = 8, and XD = 
, find AD.