Co-interior angles $120^{\circ}$ and $70^{\circ}$. The lines are

Co-interior angles $120^{\circ}$ and $70^{\circ}$. The lines are
  1. not parallel
  2. parallel
  3. perpendicular
  4. coincident

Solution

$120 + 70 = 190 \ne 180$, so not parallel.

Asked in: MH-SSC-9

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