একটি ত্রিভুজের একটি কোণের পরিমাণ ৩০ ডিগ্রী। অন্য কোণ দুটির একটি অন্যটির দ্বিগুণ হলে ক্ষুদ্রতর কোণটির পরিমাপ কত?
A. ২০ ডিগ্রী
B. ৩০ ডিগ্রী
C. ৪০ ডিগ্রী
D. ৫০ ডিগ্রী
সঠিক উত্তরঃ
D.
৫০ ডিগ্রী
Explanation:
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