# 2.  In the given Fig , are the following adjacent angles?(a) $\angle AOB$  and $\angle BOC$ (b) $\angle BOD$  and $\angle BOC$Justify your answer.

(a) $\angle AOB$  and $\angle BOC$ are adjacent angles as they have common vertex and share a common arm.
(b)  $\angle BOD$  and $\angle BOC$ are not adjacent angles as $\angle BOC$ is contained in $\angle BOD$.