ΔABC-তে, O হল ত্রিভুজের পরিধিকেন্দ্র এবং ∠BOC = 60°, তাহলে ∠BAC-এর মান কত হবে?

  1. 90°
  2. 30°
  3. 60°
  4. 45°

Answer (Detailed Solution Below)

Option 2 : 30°
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প্রদত্ত:

O হল পরিধিকেন্দ্র

∠BOC = 60°

সূত্র ব্যবহৃত:

কেন্দ্রে উপস্থিত কোণটি বৃত্তে উপস্থিত কোণের দ্বিগুণ

গণনা:

quesImage4302

∠BOC = 2 x ∠BAC

⇒ 60° = 2 x ∠BAC

⇒ ∠BAC = 30°

∴ ∠BAC হল 30°

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