A ও B পরস্পর সম্পূরক কোণ। কোণ A= ১২০ ডিগ্রি হলে কোণ B= কত?
A.
৫০ ডিগ্রী
B.
৬০ ডিগ্রী
C.
৭০ ডিগ্রী
D.
৮০ ডিগ্রী
সঠিক উত্তরঃ
B.
৬০ ডিগ্রী
Explanation:
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