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In the given figure, why AC||DE? |
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Answer» In the given figure, AC || DE because if we take DC as a transversal then angle ACD = angle CDE But they are alternate angles, Hence AC || DE ∵ ∠ EDC = 100° and ∠DCA are alternative interior angles of lines DE and AC whose transversal is CD. ∴ DE || AC (One pair of alternative angles are equal . so lines are parallel). |
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