The adjoining figure is a rectangle whose diagonals AC and BD intersect at O. If ∠OAB = 27°, then find ∠OBC.
Question
The adjoining figure is a rectangle whose diagonals AC and BD intersect at O. If , then find .
Solution
In a rectangle, the diagonals are equal in length and bisect each other. This means that they cut each other in half at the point of intersection, which is point O in this case.
Since the diagonals bisect each other, this means that ∠OAB = ∠OBA. Given that ∠OAB = 27°, this means that ∠OBA is also 27°.
In a rectangle, the sum of the angles is 180°. Therefore, ∠OBC = 180° - ∠OBA = 180° - 27° = 153°.
So, ∠OBC = 153°.
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