prove that - If a transversal. intersects two lines such that a pair of alternate interior angles are equal, then the two lines are parallel.
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Answer:
A transversal AB intersects two lines PQ and RS such that
∠PLM = ∠SML
To Prove: PQ ||RS
Proof: ∠PLM = ∠SML ……………equation (i) (Given)
∠SML = ∠RMB …………equation (ii) (vertically opposite angles)
From equations (i) and (ii);
∠PLM = ∠RMB
But these are corresponding angles.
We know that if a transversal intersects two lines such that a pair of alternate angles are equal, then the two lines are parallel to each other.
Hence, PQ║RS Proved.
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