1.

Which pair of lines in fig are parallel? Given reasons

Answer»

∠A + ∠B = 115° + 65°

= 180°

Therefore,

AB ‖ BC, as sum of co interior angles are supplementary.

∠B + ∠C = 65° + 115°

= 180°

Therefore,

AB ‖ CD, as sum of co interior angles are supplementary.



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