What is a Transitive Property of Parallel Lines?

What is a Transitive Property of Parallel Lines?
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If L1 is parallel to L2 and L2 is parallel to L3 then L1 isparallel to L3.
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Last Answer : AB || CD and a transversal EF intersects them ∴ ∠EGB = ∠GHD ( Corresponding Angles) ⇒ 2 ∠EGM = 2 ∠GHL ∵ GM and HL are the bisectors of ∠EGB and ∠EHD respectively. ⇒ ∠EGM = ∠GHL But these angles form a pair of equal corresponding angles for lines GM and HL and transversal EF. ∴ GM || HL.

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