Question

in the given figure l parallel to M show that angle 1 + angle 2 -angle 3 = 180
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Answer 1

Answer:

two lines are parallel if there sum of angles are 1800 1)=∠l+∠m =1260+440 = 1700 they are not parallel 2)=∠l+∠m =750+750 =1500. They are not parallel 3)=∠l+∠m =1230+570