Question

In the figure, AOB is a straight line. If $\angle AOC+\angle BOD={85}^0$, then$\angle COD$

• A. ${85}^0$
• B. ${90}^0$
  
• C. ${95}^0$
• D. ${100}^0$

Answer 1

The correct option is C

${95}^0$

AOB is a straight line, OC and OD are rays on it and $\angle AOC+\angle BOD={85}^0$
But $\angle AOC+\angle BOD+\angle COD={180}^0$
$\Rightarrow {85}^0+\angle COD={180}^0$
$\angle COD={180}^0-{85}^0={95}^0$