Couples of angles
When two lines are crossed by a line...
In the image....
Alternate exterior angles:
∡1 and ∡6
Alternate interior:
∡4 and ∡7
When two parallel lines are crossed by another line...
In the image of the question...
Corresponding angles:
∡3 and ∡7
∡1 and ∡5
Consecutive interior angles:
There are not known cosecutive angles
When two lines are crossed...
In the image of the question...
Vertical angles:
∡5 and ∡6
∡3 and ∡4