Play with the applet to explore the similarities and differences between vertical angles and linear pairs. Notice the check boxes that display each concept, and be aware of the relationship between the top and bottom diagrams.

LINEAR PAIRS
--Pause the slider if it is moving
1. What do you notice about the linear pairs?
2. What measurement do the linear pairs add up to be?
3. Do you think this is true for ALL linear pairs?
--Move the slider again to find out!
VERTICAL ANGLES
--Pause the slider if it is moving
1. What do you notice about the vertical angles?
2. Do you think this is true for ALL vertical angles?
--Move the slider again to find out!
*Do you notice anything else about the diagram? Hint: Look at all the present angle measurements and add some angle measurements to the diagram to better explain/display what you are thinking!