The point of intersection of diagonals of a square ABCD is at the origin and one of its vertices is at A(4, 2). What is the equation of the diagonal BD?

NDA 2021 Mathematics question

The point of intersection of diagonals of a square is at the origin and one of its vertices is at . What is the equation of the diagonal ?

Answer: (A)

The diagonal passes through and the centre , so its slope is . The diagonals of a square are perpendicular and both

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Question ID VK-033554