GeometryQuestion 402 of 550

A rectangle is 12 cm long and 5 cm wide. What is the length of its diagonal?

  1. 17 cm
  2. 15 cm
  3. 11 cm
  4. 13 cm
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Correct answer: 13 cm

The diagonal is the hypotenuse of a right triangle with legs 12 and 5. Diagonal = √(144 + 25) = 13 cm.

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Questions last reviewed: 21 October 2026