6,9,15,18 দৈর্ঘ্য বিশিষ্ট সরলরেখা দ্বারা কয়টি ত্রিভুজ গঠন করা যাবে?
A. 1
B. 2
C. 3
D. 4
সঠিক উত্তরঃ
B.
2
Explanation:
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