What you have asked cannot be proven based on the information that you have given. In general, your assertion is not true because I can create a situation where the given relations hold, but the assertion is false. I presume that there was a diagram with this problem, and you simply expected us to smell what it looked like. Unfortunately for you, the use of this website does require you to do some actual thinking for yourself.
John
My calculator said it, I believe it, that settles it