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Question -

In the figure, ∠1 = 60° and ∠2 = (23)3 a right angle. Prove that l || m.



Answer -

In the figure, a transversal n intersects two lines l and m
∠1 = 60° and
∠2 = rd of a right angle 2
=  x 90° = 60°
∴ ∠1 = ∠2
But there are corresponding angles
∴ l || m

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