Question:প্রথম কোণটির ডিগ্রি পরিমাপ কত? 

A 45 
B 60 
C 75 
D 90 

+ Answer
A 

+ Explanation
12x =` 180^0`; :. x = 15^0`

    :. 3x = `3 xx 15^0 = 45^0`

+ Report

Irin Moni

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