I have a 3/12 pitch roof (3 inch's of rise for each 12 inch's of
run). I am installing Facia Board (1x8 pine) and my question concerns
the proper angle cut at the ridge of the roof. The right angle
triangle by definition of the 3/12 pitch has a 90degree angle at the
top plate center, a 14degree angle at the eave and a 76degree angle at
the ridge (for a total of 180degrees in the right triangle)

Vision a gable roof and the two right triangles would fit against each
other and form the gable. The two 76degree angles would be together
at the ridge of the roof. What would the plumb cut be in degrees for
the facia board on the ridge? I thought that with two 76degree angles
combined that I would split that in half for the cut, but obviously
that is wrong. The angle cut is not 76degrees and my miter saw
wouldn't cut that anyway. I think the angle cut may be 14degrees for
each of the facia boards joining at the ridge on the two 76degree
angles, but I don't know why I think that or how the angle is actually
calculated.

Thanks for any assistance with the angle cut.

David