Co-interior angles are $90^{\circ}$ and $90^{\circ}$. The lines are

Co-interior angles are $90^{\circ}$ and $90^{\circ}$. The lines are
  1. parallel
  2. perpendicular
  3. intersecting
  4. coincident

Solution

$90 + 90 = 180$, parallel.

Asked in: MH-SSC-9

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