What is the common ratio of side ad to side wz?

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Having a hard time understanding this question (see attachment).