Practice 2: What is the supplement of 74.3 degrees?

Practice 4a: What is the sum of  $m\angle5+m\angle6+m\angle7+m\angle8=$  

Practice 4b: What is the sum of  $m\angle9+m\angle10=$  

Practice 4c: If the $m\angle9=\ 48\degree$  , what is the  $m\angle10?$  

Practice 4d: If the $m\angle3=\ 140\degree$  , what is the  $m\angle2+m\angle4?$  

Practice 5a: Linear pair angles are adjacent

Practice 5b:Vertical angles are complementary

Practice 5c : Adjacent angles share a common side and vertex.

Practice 5d : Supplementary angles are adjacent.