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Theorem 6.6 - Lines parallel to same lines are parallel to each other.jpg

Theorem 6.6 - Chapter 6 Class 9 Lines and Angles - Part 2


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Theorem 6.6 :- Lines which are parallel to the same lines are parallel to each other. Given :- Three lines l, m, n and a transversal t such that l m and m n . To Prove :- l n. Proof :- From (1) and (2) 1 = 3 But they are corresponding angles. For lines l & n with transversal t, corresponding angles are equal Hence l and n are parallel. Hence l n Hence proved

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.