GeometryQuestion 450 of 550

Two sides of a triangle are 5 cm and 9 cm. Which length can the third side be?

  1. 4 cm
  2. 14 cm
  3. 15 cm
  4. 7 cm
Show answer

Correct answer: 7 cm

The third side must be between 9 - 5 = 4 and 9 + 5 = 14, not equal to them. Only 7 fits.

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Questions last reviewed: 21 October 2026