How to measure aerial silk length

When you visit places like an airport, shopping mall, or music venue how often do you look up and think ... hmm this would be a great place to hang a silk!?

Ya, me too ... all the time! I call it ceiling envy :)

If you were able to rig a silk from that lofty 30-foot ceiling at the mall, how much silk would you need to order? This tip is about exactly that, aerial math!