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Theorem 6.8 - Chapter 6 Class 9 Lines and Angles

Last updated at May 29, 2023 by

Theorem 6.8 - if side of triangle is produced then the exterior angle so formed.jpg

Theorem 6.8 - Chapter 6 Class 9 Lines and Angles - Part 2

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Theorem 6.8 :- If a side of a triangle is produced, then the exterior angle so formed is equal to the sum of the two interior opposite angles. Given :- A PQR ,QR is produced to point S. where PRS is exterior angle of PQR. To Prove :- 4 = 1 + 2 Proof:- From (1) and (2) 3 + 4 = 1 + 2 + 3 4 = 1 + 2 PRS = RPQ + PQR Hence, exterior angle is sum of two opposite interior angles. Hence proved

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.