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Q.

InΔABC ,AB=c,BC=a,CA=b . If D  is a point on produced BC  so that

AD  bisects ∠A externally, then BD:DC=

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a

a:b

b

b:c

c

c:a

d

c:b

answer is A.

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Detailed Solution

Question Image

By Vertical angle bisector theorem

BDCD=BAAC⇒BDDC=cb

∴ BD:DC=c:b

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InΔABC ,AB=c,BC=a,CA=b . If D  is a point on produced BC  so that AD  bisects ∠A externally, then BD:DC=