Determine whether the angles are adjacent angles, a linear pair, or vertical angles.
Some pairs of angles may have more than one relationship.
Angle
Adjacent angles
Linear pair
Vertical angles
∠
5
a
n
d
∠
6
∠5 and ∠6
∠
5
a
n
d
∠
9
∠5 and ∠9
∠
5
a
n
d
∠
8
∠5 and ∠8
For each pair of angles:
∠5 and ∠6: Adjacent angles
∠5 and ∠9: Vertical angles
∠5 and ∠8: Neither adjacent angles, nor a linear pair, nor vertical angles.