A triangle cannot have angles

A triangle cannot have angles
  1. $90^{\circ}, 90^{\circ}, 0^{\circ}$
  2. $60^{\circ}, 60^{\circ}, 60^{\circ}$
  3. $30^{\circ}, 60^{\circ}, 90^{\circ}$
  4. $45^{\circ}, 45^{\circ}, 90^{\circ}$

Solution

All angles must be positive.

Asked in: MH-SSC-9

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