Question

Maths question!!!!!please anyone tell me​

Answer 1

Since, O is the circumcentre of △ABC, So, O would be centre of the circle passing through points A, B and C.

∠ABC = 90° (Angle in the semicircle is 90°.)

⇒∠OAB+∠OBC=90° .....(1)

As OA = OB (Radii of the same circle)

∴∠OAB=∠OBA (Angle opposite to equal sides are equal)or, ∠BAC= ∠OBAFrom (1)∠BAC+∠OBC=90°