A, B and C are three points on a circle at the circumference with O as the centre, such that angle AOB is 3x and angle AOC is x. Find ratio of angle ACB to angle AOB ?

• Draw the geometrical figure first. We can easily see that Angle ACB = 3x/2 [Angle subtended at the cetre is twice the angle on the circumference.
  
  And angle AOB = 3x
  
  Therefore, the required ratio is 3x/2 * 1/3x = 1:2
• 10 years agoHelpfull: Yes(35) No(6)