Length of a Rafter and Rafter Calculations

How do you know how long to cut a rafter for your building project? Apply Pythagorean theorem to find your length and than use the trig functions to determine your pitch angle. Mr. C. Reviews the terminology on a rafter and goes over how to calculate the length of the rafter for the Model roof project.

[@madnalab3901]

excuse me but, I thought that "facia" not the soffit. am I'm wrong?

[@bradcurry7775]

Nope, you are correct. I misspoke. It is the sub-facia not the soffit.