[b]Definition:[/b] [b][color=#b20ea8]Vertical Angles -[/color][/b] Nonadjacent angles formed by intersecting lines. [br][br]When 2 lines intersect, 2 pairs of vertical angles are formed. [color=#b20ea8]One pair of vertical angles is shown below. [/color] [br][color=#888](Click the other checkbox on the right to display the other pair of vertical angles.) [/color][br][br]Interact with the following applet for a few minutes, then answer the questions that follow.