ΔABCలో, ∠B మరియు ∠C యొక్క అంతర్గత ద్విభాగాలు O వద్ద కలుస్తాయి. ఒకవేళ ∠BAC = 72°, అప్పుడు ∠BOC విలువ:

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SSC CGL 2023 Tier-I Official Paper (Held On: 19 Jul 2023 Shift 2)
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  1. 110° 
  2. 126°
  3. 136° 
  4. 146° 

Answer (Detailed Solution Below)

Option 2 : 126°
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Detailed Solution

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సాధన : 

∠BAC = 72°
 
కోణాల మొత్తం ద్వారా
 
⇒ ∠A + ∠B + ∠C = 180
 
⇒ ∠B + ∠C = 180 − 72 = 108
 
⇒ ∠OBC + ∠OCB = 54
 
కోణీయ ద్విభాగాలు O వద్ద కలుస్తాయి
 
కాబట్టి కోణాల మొత్తం ద్వారా,
 
⇒ ∠OBC + ∠OCB + ∠BOC = 180
 
⇒ 54 + ∠BOC = 180
 
⇒ ∠BOC = 126
 
∴ సరైన సమాధానం 126°.
 

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