Supplement of an acute angle is always a/an angle.

Check whether following pair of angles are adjacent 

Check whether following pair of angles are adjacent  

Check whether following pair of angles are adjacent   

Find the degree measure of angle in the following linear pair 

Find the degree measure of angle in the following linear pair  

List the following pairs under two groups, complementary angles and supplementary angles  

$\left(130°,50°\right), \left(55°,35°\right), \left(100°,80°\right), \left(70°,20°\right), \left(50°,40°\right), \left(60\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.°,29\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.°\right), \left(100.5°,79.5°\right), \left(22\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.°,67\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.°\right)$

In the following figures mark the vertically opposite angles. Which of these are equal to each other? 

In the following figure state whether the line $l$ is a transversal.