Answer:
8
Step-by-step explanation:
CD is an altitude. It is perpendicular to AB, and it splits AB in half. If AB=16, and CD splits AB in half, to find AD you would do this:
1/2AB
1/2·16=8
8 is your answer.
Yu can also see that AD and DB are congruent, so their values must be the same.
~Stay golden~:)
