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In the given figure:
(i) If
∠AOB=45∘,∠BOC=30∘,∠AOD=110∘ find the angles
COD and
BOD.
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Solution
Given:
∠AOB=45∘
∠BOC=30∘ and
∠AOD=110∘
To find :
∠COD and ∠BOD
∠AOD=110∘
∠AOB+∠BOC+∠COD=110∘[from figure]
45∘+30∘+∠COD=110∘ [given]
∠COD=110∘−75∘
∴ ∠COD=35∘
∴∠BOD=∠BOC+∠COD
⇒ ∠BOD=30∘+35∘=65∘
Hence,
∠COD=35∘ and
∠BOD=65∘