Which angles are adjacent to < DOC?
<AOB and <EOA
<DOB
<AOD
<EOD and <COB
The angles adjacent to <DOC are:
<AOB and <EOA. These angles share a vertex with <DOC.
<DOB is not adjacent to <DOC because it does not share a vertex with <DOC.
<AOD is not adjacent to <DOC because it does not share a vertex with <DOC.
<EOD and <COB are not adjacent to <DOC because they do not share a vertex with <DOC.