Theorem 6.8 - Chapter 6 Class 9 Lines and Angles

Last updated at April 16, 2024 by

Slide15.JPG

Slide16.JPG


Transcript

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

Go Ad-free
Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.