दी गई आकृति में वृत का केंद्र O है यदि ∠AOB = 40° हो तो ∠OAB = ? - - Dee Gayi Aakriti Me Vrit Ka Kendra O Hai Yadi ∠AOB = 40° Ho To ∠OAB = ? Maths in hindi, circles 60° question answers in hindi pdf 70° questions in hindi, Know About 50° Maths online test Maths notes in hindi quiz book 80°