दिए गये चित्र में AB ∥ CD, ∠ABO = 30° तथा ∠CDO = 40° हो तो बहुत्कोण ∠BOD = ? - - Diye Gaye Chitra Me AB ∥ CD , ∠ABO = 30° Tatha ∠CDO = 40° Ho To बहुत्कोण ∠BOD = ? Maths in hindi, lines 240° question answers in hindi pdf 280° questions in hindi, Know About 290° Maths online test Maths notes in hindi quiz book 260°