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Lines and Angles — MATHS STD 7 — Question

Gujarat BoardEnglish MediumSTD 7MATHSLines and Angles1 Mark
MCQ
Supplementary angle of $100^\circ $ is:
  • A
    $180^\circ$
  • B
    $90^\circ$
  • ✓
    $80^\circ$
  • D
    $60^\circ$
✓

Answer

Correct option: C.
$80^\circ$

 Let the supplement be $x$
If angles are supplementary then their sum is $180^\circ $
$\Rightarrow x + 100^\circ = 180^\circ $
$x =180^\circ - 100^\circ $
$x = 80^\circ $

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