One radian is the angle subtended at the centre by an arc:

  1. equal to the diameter
  2. of length 1 cm
  3. equal to the circumference
  4. equal in length to the radius
Answer

D) equal in length to the radius

theta = s/r = 1 when s = r. SLO P-11-B-07 · Understanding

Physics MCQ · More Circular and Rotational Motion MCQs · Practise