Two lines are parallel. A transversal makes interior angles on the same side. Their sum is

Two lines are parallel. A transversal makes interior angles on the same side. Their sum is
  1. $180^{\circ}$
  2. $90^{\circ}$
  3. $360^{\circ}$
  4. $120^{\circ}$

Solution

Co-interior angle theorem.

Asked in: MH-SSC-9

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