. Use the figure below to identify angles and segment lengths.


Part I: Find the measure of and the measure of . Give an explanation for each angle in your answer. (1 point)



Part II: Suppose the length of AD is 10 and the length of DG is twice as long as AD. Find the length of AG. Show your work. (1 point)





Part III: Name a pair of vertical angles, a straight angle, and two acute angles other than . (1 point)


Part IV: Describe the term linear pair, and give an example from the diagram above. (1 point)