Click on any of the points A, B, C, or D and drag them to a new location. Observe the angle relationships, and answer the questions that follow.

1. Can you find any angles that add up to form a straight line? What do you notice about their measurements? Name them.[br][br]2. Can you find any angles that appear to be the same size? Name them.[br][br]3. Can you find any angles that are opposite to each other? Name them. What do you observe about the relationship of two angles?[br][br]4. Can you find two angles that are beside each other? What do you notice about these two angles? What do they have in common? [br][br]5. Can you find two angles that are both supplementary and adjacent?