Explanation:
<1 and <2-linear pair
<4 and <5-pair of interior alternate angles
<1 and <3-linear pair
<2 and <3-vertically opposite angles
<3 and <7-neither
<5 and <8-neither
<2 and <4-linear pair
<1, <2 and <3-adjacant angles
8.8m questions
11.4m answers