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The two co-interior angles on the same side of a transversal are 110° and 60°. Do the lines meet on this side?

Class 9The Fifth PostulateGeometry — Foundations
  • AYes, since 170° < 180°
  • BNo, since 170° > 180°
  • CNo, the lines are parallel
  • DCannot be decided

Step-by-Step Solution

110 + 60 = 170°, which is less than 180°, so by the fifth postulate the lines meet on this side.
Answer: A) Yes, since 170° < 180°

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