I know there is a answer,but I can't figure it out I'm making 1×2 christmas trees See photo,It calls for a angle cut at 49 degrees. On my miter saw it's marked as 0 (90) - 45.So my thinking is 0 is 90 and then 49 would read 41 on the saw.(let me know if this is the wrong thinking) but My issue comes when I place the boards as required together (one end calls for 20 and the other has the 49), when I put them together I get a gap of anywhere from a piece of paper to a business card gap at the joints,I have checked the cut and they are even,checked the measurements and they are right on,check the angles they are right on,tried angles from 48-51 and still get same results.yes know big deal on these I can and do putty them,but projects like this I use as honig a skill projects. can any see what I maybe doing wrong or how to fix? arrows point to joints.