engineering mathematics MCQ #1880

The point (3, 4) lies on the circle x² + y² = r². The radius is

engineering mathematics MCQ #1880

  1. Question 1

    Q1. The point (3, 4) lies on the circle x² + y² = r². The radius is

    • A) 3
    • B) 4
    • C) 5
    • D) 6

    Answer: 5

    Explanation: Substitute (3, 4) into the equation: 3² + 4² = 9 + 16 = 25 = r². So, r = √25 = 5.