engineering mathematics MCQ #581

Which equation represents a circle?

engineering mathematics MCQ #581

  1. Question 1

    Q1. Which equation represents a circle?

    • A) x² + y² = 4
    • B) x²/4 + y²/9 = 1
    • C) y² = 4x
    • D) x²/16 - y²/9 = 1

    Answer: x² + y² = 4

    Explanation: A circle has equal x² and y² coefficients with no cross term. General form: (x−h)² + (y−k)² = r².