O কেন্দ্রবিশিষ্ট বৃত্তে AB একটি ব্যাস ভিন্ন জ্যা। OD, AB এর উপর লম্ব। AD = 2.5 cm হলে, AB = কত cm?
A. 4 cm
B. 5 cm
C. 6 cm
D. 3 cm
সঠিক উত্তরঃ
B.
5 cm
Explanation:
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