Answer:
AOC
Step-by-step explanation:
Angle COX is formed at vertex O with two rays OC and OX.
Angle AOX is formed at vertex O with two rays OA and OX.
Ray OA lies between rays OC and OX.
All three rays have the common vertex O.
The angle addition postulate describes that putting two angles side by side with their vertices together creates a new angle whose measure equals the sum of the measures of the two original angles.
So,
[tex]m\angle AOX+m\angle AOC=m\angle COX[/tex]
