Question

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Answer 1

Answer:

as AOB is a straight line so angle AOB=180°

a+b=180°

let common ratio is x

so, a=3x

b=2x

3x+2x=180°

=> 5x=180°

=> x=180/5°=36°

so, a=3×36°=108°

b=2×36°=72°

so, a-b=(108-72)°=36°