दी गई आकृति में एक वृत का केंद्र O है यदि ∠OAC = 40° हो तो ∠BOD = ? - - Dee Gayi Aakriti Me Ek Vrit Ka Kendra O Hai Yadi ∠OAC = 40° Ho To ∠BOD = ? Maths in hindi, circles 100° question answers in hindi pdf 90° questions in hindi, Know About 80° Maths online test Maths notes in hindi quiz book 120°