1 . The 2nd angle of a right triangle is 30 ডিগ্রী. Then what is the 3rd angle?
- A. 50ডিগ্রী
- B. 60ডিগ্রী
- C. 70ডিগ্রী
- D. 80ডিগ্রী
- D. None of them
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