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AB || CD, and a transversal meets them. The bisector of one interior angle of 120° is drawn.
What angle does this bisector make with the parallel line (the half-angle)?

Class 9Parallel Lines and a TransversalGeometry — Lines and Angles
  • A120
  • B66
  • C60
  • D54

Step-by-Step Solution

The interior angle is 120°; its bisector splits it into two equal halves of deg each.
Answer: C) 60

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