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A quadrilateral's diagonals bisect each other at right angles. It must be a:

Class 9Rectangle, Rhombus and SquareGeometry — Quadrilaterals
  • Arhombus
  • Brectangle
  • Ctrapezium
  • Dkite that is not a parallelogram

Step-by-Step Solution

Bisecting diagonals make it a parallelogram. Perpendicular bisectors give all four small right triangles congruent (SAS), so all sides are equal: a rhombus.
Answer: A) rhombus

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