Final answer:
The question is unclear and incomplete. It depends on the context and the nature of the change, as well as the specific task at hand.
Step-by-step explanation:
The question is unclear and incomplete. It seems to be missing the second part of the sentence. However, assuming the question is asking about how many geometry teachers it takes to change something, I would say that it depends on the context and the nature of the change.
If the change refers to changing the curriculum or teaching methods, then it would require the collaboration and effort of the entire math department, which consists of 16 teachers and 7 staff members. However, if the change refers to a smaller task, such as rearranging the classroom or solving a particular problem, then it would only require one geometry teacher.
Without more information, it is difficult to provide a specific answer to the question.