Electrical mathQuestion 484 of 1506

A right triangle has a hypotenuse of 13 units and one side of 5 units. What is the other side?

  1. 8 units
  2. 18 units
  3. 12 units
  4. 144 units
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Correct answer: 12 units

B = sqrt(13^2 - 5^2) = sqrt(169 - 25) = sqrt(144) = 12.

Source: Trigonometry and Single Phase AC Generation for Electricians (Flinn), 1.3: Pythagoras

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Questions last reviewed: 18 October 2026