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प्रश्न
In a ΔABC, AD is the bisector of ∠A. If AB = 6.4 cm, AC = 8 cm and BD = 5.6 cm, find DC.
योग
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उत्तर
It is give that AD bisects ∠A.
Applying angle – bisector theorem in Δ ABC, we get:
`(BD)/(DC)=(AB)/(AC)`
⟹`(5.6)/(DC)=6.4/8`
⟹DC `=(8xx5.6)/6.4=7cm`
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