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Which of these data sets does NOT determine a unique quadrilateral?

Class 8Constructing QuadrilateralsGeometry
  • A4 sides and 1 diagonal
  • B3 sides and 2 diagonals
  • C4 sides only
  • D2 adjacent sides and 3 angles

Step-by-Step Solution

Four sides form a flexible (non-rigid) hinged figure; the shape can change while keeping side lengths. So 4 sides alone are not enough.
Answer: C) 4 sides only

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