AC theoryQuestion 508 of 1506

A rectangular vector in quadrant 3 is converted to polar form. How is the polar angle found from the calculated angle?

  1. 180 plus the calculated angle
  2. 180 minus the calculated angle
  3. 360 minus the calculated angle
  4. The calculated angle itself
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Correct answer: 180 plus the calculated angle

Quadrant 3 angles lie between 180 and 270 degrees.

Source: Trigonometry and Single Phase AC Generation for Electricians (Flinn), 2.4: Vector Addition

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Questions last reviewed: 18 October 2026