Question
Download Solution PDFপ্রদত্ত চিত্রে, ∠ABC = 81° এবং ∠ACB = 9°। ∠BDC এর মান কত?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFপ্রদত্ত:
∠ABC = 81°
∠ACB = 9°
ব্যবহৃত ধারণা:
একই চাপ দ্বারা পরিধিতে উৎপন্ন কোণ সমান হয়।
ত্রিভুজের অভ্যন্তরীণ কোণের সমষ্টি 180°।
গণনা:
△ ABC-তে
⇒ ∠ABC +∠ACB + ∠BAC = 180° (কোণ সমষ্টি ধর্ম)
⇒ 81° + 9° + ∠BAC = 180°
⇒ ∠BAC = 180° - 90° = 90°
এখন,
⇒ ∠BAC = ∠BDC = 90° (একই অংশে কোণ)
∴ সঠিক উত্তর হল ∠BDC = 90 ° ।
Last updated on Jul 17, 2025
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