what's that angle?

Hello. I received delivery of my 14/12 10-foot gable storage trusses, but I don't know the angle (in degrees) of the miter at the top (where the 2 rafters meet). The reason I think I want to know this is so I can miter the fly rafters at the same angle. I've studied the plans that the truss maker sent along, but from what I can tell, the angle is not listed. I probably have the right square for determining the angle, but don't know how to do it. And if there is a shortcut - like not even bothering to miter the tops of the fly rafters, then I'd bite hard on whatever it is. (I have assumed I could cover the gap with fascia, but then I'd still need to know the angle anyway to miter the fascia right?)
Thanks, and as always, much appreciated.
SDP in Wisconsin

 

I would cut a scrap piece of wood with a chop saw. Once you match the angle, you'll see the degrees on the saw.

 

I was starting to do that, but I knew there had to be a better way. I don't want to be off by a little bit and have it translate to a lotta bit at the ends. And I'd have to rebuild the fly rafters too. I hate rebuilding - I do too much of it.

 

Well, I found the answer. I ended up at http://www.wonderhowto.com and there are several videos for how to use a framing sqaure and a speed square. If anyone else is in the dark like I was, these are some extremely helpful videos. Here are just two of them:

http://www.wonderhowto.com/how-to/vi...square-198506/

http://www.wonderhowto.com/how-to/vi...-square-78922/

 

The included angle would be 81.202 degrees, or 81 degrees, 12 minutes, 9 seconds. And they said you'd never need that high school trigonometry course....

 

OK, so if the included angle that's created at the peak is 81.202, then I can miter each rafter's top end at 49.399 degrees (give or take...) and I'll have it right.
Right?
180 - 81.202 = 98.798
And 98.798 / 2 = 49.399
These angles should be consistent for every 14/12 pitch then I suppose.

 

It's 49.399 from the horizontal; 40.101 from the vertical. If you were to draw a 45 degree line on the rafter, your new angle will be more acute (pointier) than the 45. That's assuming your roof is taller than it is wide, which is what 14/12 means. That's a steep roof! The angle at the peak will be 40.101; the one at the wall will be 49.399. I always draw myself a picture to scale, esp. when it's close to 45 degrees, to prevent confusion. I'm a toolmaker by trade, and use trig nearly every day, but it's easy to flip flop the angles, and make it exactly.... wrong. A quick sketch on drafting paper is all you need. And of course, cut a test piece first! There's always the chance that the trusses you got aren't exactly 14/12- I've seen it happen.