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একটি অর্ধবৃত্তে অন্তর্লিখিত কোণের পরিমাপ কত?

A45°
B90°
C180°
D60°
Answer & Solution
Correct answer: B. 90°
একটি ব্যাস দ্বারা সম্মুখস্থ অন্তর্লিখিত কোণ হলো একটি সমকোণ (Thales' theorem)।
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