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ΔABC এর ∠B = 90° হলে, নিচের কোনটি সঠিক?

A B^{2} = B C^{2} + A C^{2}

A C^{2} = B C^{2} + A B^{2}

A B^{2} + B C^{2} + A C^{2} = 0

B C^{2} = A B^{2} + A C^{2}

ANS : 2

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