In Fig 10.38,ABC =69°, ACB =31°,find BDC. – InterviewSolution

1.

In Fig 10.38,ABC =69°, ACB =31°,find BDC.

Answer»

6)∠ABC = 69°, ∠ACB = 31° [Given]

InΔABC∠ABC + ∠ACB+∠BAC = 180°⇒ ∠BAC = 180° - ∠ABC - ∠ACB⇒ ∠BAC = 180° -69° - 31° = 80°

∠BDC = ∠BAC ( Angle drawn from same chord)

∴ ∠BDC= 80°

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