Answers

2016-03-11T23:26:47+05:30
Supplement of 120°is 60°.
when we take any radius for an arc keeping the compass on A .And when the arc meets the line segment at a point ,keeping the compass at that point , if we cut the arc ,we get 60°,and 60+60=120 .
So,keeping the compass at the point of 60°,we should cut the arc again ,we get 120°...
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