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AreQ18.Prove that iſ two lines intersect, then the vertically opposite anglesequal.​

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Step-by-step explanation:

If two lines intersect each other, then the vertically opposite angles are equal. ... They LEAD to two pairs of vertically opposite angles, namely, (i) ∠ AOC and ∠ BOD (II) ∠ AOD and ∠ BOC. We need to PROVE that ∠ AOC = ∠ BOD and ∠ AOD = ∠ BOC.



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