See the image below:
When I lay this out in Fusion, I can get the angles but I can't figure out how to calculate it mathematically.
The goal is to have the angled stretcher fully contact the upper 45"-long support and the floor(even though there will be excess to remove.)
I'm looking for a formula for calculating the stretcher angle (35.8 in this case) and the length that the 2x4 would have to be.
I know how to calculate all of the angles of a right triangle, but no combination or the dimensions of the project give the correct angle.