1. The problem statement, all variables and given/known data Calculate the period of the Pirate ship if it were a pendulum. 2. Relevant equations Sine laws: SinA/a = SinB/b = SinC/c Soh Cah Toa as well for 90 degrees triangles. 3. The attempt at a solution http://img517.imageshack.us/img517/3668/scanrj4.jpg I've tried it on there. I made a diagram but I'm lost. I need to find L and then t. I think it's 12, the radius. I'm not 100% sure though. Any help is greatly appreciated.