Question 13 The circumcentre of the ΔABC is O. Prove that ∠OBC+∠B

1.	Question 13 The circumcentre of the ΔABC is O. Prove that ∠OBC+∠BAC=90∘.
Answer» Question 13 The circumcentre of the $Δ A B C$ is O. Prove that $∠ O B C + ∠ B A C = 90^{\circ}$ .

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