Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFউপপাদ্য অনুসারে, অর্ধবৃত্তের কোণ হল একটি সমকোণ,
⇒ ∠BOA = 90°
উপপাদ্য: বিকল্প খণ্ডের উপপাদ্য অনুসারে, ছেদবিন্দুর মধ্য দিয়ে একটি স্পর্শক এবং একটি জ্যার মধ্যে উৎপন্ন কোণ বিকল্প অংশের কোণের সমান।
⇒ ∠BOQ = ∠BAO = 60°
ΔABO-তে,
ত্রিভুজের কোণের সমষ্টি 180°
⇒ ∠ABO = 180° – ∠BOA – ∠BAO = 180° – 90° – 60° = 30°
Last updated on Jun 11, 2025
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