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Measurements of Angles

  • When an angle is expressed in radians, the word radian is generally omitted.
  • We have π radians = 180°  1 radian = 105842.png(approx).
  • 180° = π radians  1° = 105836.png radian = 105829.png radian = 0.01746 radian.
  • Sum of interior angles on convex polygon of n sides is (n –2)π radians.




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