investigating Intersecting Line Properties

Lines a and b are intersecting lines, forming two types of angle pairs: Vertical Angles and Linear Pairs. Move one slider at a time. Drag around the points to change the measures of the angles. Which type of angle pairs are always congruent?: Which type of angle pairs are always supplementary (add to 180): Which type of angle pairs are Adjacent Angles? Write your answers on the Google Doc attached to this assignment.
Points A, B, C, and D can be moved by the user to change the orientation of the intersecting lines. Points must stay to the same side of Point E for the demonstration to works.