Respuesta :

Answer:

adjacent angles are angles that share a side and a common vertex, basically, they are just angles next to each other that are formed by the same point.

Step-by-step explanation:

all adjacent angles are

2,1

2,3

1,4

3,4

6,7

6,5

8,5

8,7

10,11

10,9

12,9

12,11