दी गई आकृति में वृत का केंद्र O है तथा BOC इस वृत का एक व्यास है यदि ∠BCA = 30° हो तो ∠CDA = ? - - Dee Gayi Aakriti Me Vrit Ka Kendra O Hai Tatha BOC Is Vrit Ka Ek Vyas Hai Yadi ∠BCA = 30° Ho To ∠CDA = ? Maths in hindi, circles 45° question answers in hindi pdf 60° questions in hindi, Know About 30° Maths online test Maths notes in hindi quiz book 50°