Look up the definition of vertical angles.[br]Look up the definition of linear pairs.[br][br]Click on any of the points A, B, C, or D and drag them to a new location. Do this for a few different angle measures and observe the angle relationships.
1) Identify the Vertical Angles
2) What relationship do you notice about the vertical angles?
3) Identify the linear pairs.
4) What relationship do you notice about the linear pairs?