Question

Two straight lines AB and CD cut each other at O. If $\angle BOD={63}^0$, then $\angle BOC$

• A. ${63}^0$
• B. ${117}^0$
  
• C. ${17}^0$
• D. ${153}^0$

Answer 1

The correct option is B

${117}^0$

CD is a line
$\therefore \angle BOD+\angle BOC={180}^0$ (Linear pair)
$\Rightarrow {63}^0+\angle BOC={180}^0$ $\Rightarrow \angle BOC={180}^0-{63}^0$
$\therefore \angle BOC={117}^0$