[list][br][*]Show that opposite angles formed by two intersecting lines are equal[br][*]Moveable points: All blue points[br][br][/list]

[list][br][*]Show the angle relationships associated with two parallel lines and a transversal[br][*]Show the naming of angle pairs formed by two lines and a transversal[br][*]Moveable points: All blue points[br][*]Use [b]Parallel Lines[/b] checkbox to force parallel lines[br][br][/list]