दिए गये चित्र में AB ∥ CD यदि ∠OAB = 110° तथा ∠AOC = 30° हो तो ∠OCD = ? - - Diye Gaye Chitra Me AB ∥ CD Yadi ∠OAB = 110° Tatha ∠AOC = 30° Ho To ∠OCD = ? Maths in hindi, lines 80° question answers in hindi pdf 220° questions in hindi, Know About 140° Maths online test Maths notes in hindi quiz book 110°