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Byju's Answer
Standard XII
Mathematics
Length of External Common Tangent
Given: Two ci...
Question
Given: Two circles intersect each other at
C
and
D
. Line
A
B
is their common tangent.
Find the distance of
P
Q
in terms of
P
C
and
Q
D
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Solution
The circle touch each other externally at 2 different points
So The condition is
C
1
C
2
<
r
1
+
r
2
P
Q
<
P
C
+
Q
D
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