Use the applet below to answer the questions that appear beneath it.
Move the slider and examine the angle measures of the [b][color=#00ff00]green angle[/color][/b]. What do you notice?
Click the other checkbox to show the [b][color=#ff0000]other pair of vertical angles[/color][/b]. [br]Move the slider and examine the angle measures of the [b][color=#ff0000]two red vertical angles [/color][/b]now. [br]What do you notice?
Now that you have all four angle measures displayed, drag the slider around. What can you conclude about the relationship between vertical angles?