How do you solve can anyone explain

How do i solve using pythagorean theorem?

To complete your spring schedule, you must add calculus and physics. at 9: 30, there are three calculus sections and two physics sections; while at 11: 30, there are two calculus sections and three physics sections. how many ways can you complete your schedule if your only open periods are 9: 30 and 11: 30?

Hi my sisters and brothers can tell me the answer because i don’t understand the question