This is an example of how the Ninth Amendment, introduced by James Madison , clarifies that the federal government does not have power.

the labor movement in the united states grew out of the need to protect the common interest of workers

for those in the industrial sector organized labor unions fought for better wages reasonable hours and safer working conditions

  in the 19th century trade unionism was mainly a movement of skilled workers.

hope this

6 units. ab and lo are congruent sides, and if ab= 6 units, then lo would be the same.