MCQ
The supplementary angle of $120^\circ $ is:
  • A
    $30^\circ$
  • B
    $50^\circ$
  • C
    $240^\circ$
  • $60^\circ$

Answer

Correct option: D.
$60^\circ$

 Let the supplementary angle be $x$ Sum of supplementary angles is $180^\circ $
$\Rightarrow x + 120^\circ = 180^\circ $
$\Rightarrow x = 180^\circ - 120^\circ $
$\Rightarrow x = 60^\circ $

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