Red Seal Electrician Practice
Electrical mathQuestion 483 of 1506

In the formula A squared plus B squared equals C squared, which side is C?

  1. The shortest side
  2. Either side next to the right angle
  3. The side next to the designate angle
  4. The longest side, opposite the 90-degree angle
Show answer

Correct answer: The longest side, opposite the 90-degree angle

C is always the hypotenuse.

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

Practice electrical math

Questions last reviewed: 18 October 2026