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SAT
>>
Math
>>
Circles
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Q)
C
P
and
C
Q
are tangent from an external point
C
to a circle with centre
O
.
A
B
is another tangent which touches the circle at
R
. If
C
P
=
11
c
m
and
B
R
=
4
c
m
, then the length of
B
C
is _________
(
a
)
5
c
m
(
b
)
6
c
m
(
c
)
7
c
m
(
d
)
8
c
m
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