NCERT Solutions Class 9 Mathematics Chapter 6 Lines and Angles Variables

Exercise 6.1 Q.1) In Fig. 6.13, lines AB and CD intersect at O. If ∠𝐴𝑂𝐶 + ∠𝐵𝑂𝐸 = 70° and ∠𝐵𝑂𝐷 = 40°, find ∠𝐵𝑂𝐸 and reflex ∠𝐶𝑂𝐸. Sol.1) Given, ∠𝐴𝑂𝐶 + ∠𝐵𝑂𝐸 = 70° and ∠𝐵𝑂𝐷 = 40° A/q, ∠𝐴𝑂𝐶 + ∠𝐵𝑂𝐸 + ∠𝐶𝑂𝐸 = 180° (Forms a straight line) ⇒ 70° + ∠𝐶𝑂𝐸 = 180° ⇒ ∠𝐶𝑂𝐸 = 110…