NCERT math chapter 6 exercise 6.3 covers important theorems and facts regarding parallel lines, transversal lines, alternate angles, corresponding angles, interior angles, and exterior angles.
NCERT CLASS 9 Chapter 6 Exercise 6.3 Question No. 1
Page No. 107.
I need Video Solution for this Exercise 6.3.
∠PQT + ∠PQR = 180°
⇒ 110° + ∠PQR = 180°
⇒ ∠PQT = 180° – 110° = 70°
∠SPR + ∠QPR = 180°
⇒ 135° + ∠QPR = 180°
⇒ ∠QPR = 180° – 135° = 45°
In △PQR,
∠QPR + ∠PQR + ∠R = 180°
⇒ 70° + 45° + ∠R = 180°
⇒ 115° + ∠R = 180°
⇒ ∠R = 180° – 115° = 65°