You need a miter saw. It has a back gauge to butt the wood up to, and then the saw has holders to keep it from wobbling. You can set the angle. It may just have notches for 90 degrees and 45, or it may have a protractor on it.
Cut a 45 degree angle "going the other way".
A 45 degree (Acute) angle.
lay out the pattern on a 45" degree angle on .cloth
90 - 45 = 45 So another 45 degree angle is the complement of a 45 degree angle.
If I understand the question correctly, the answer is yes. All angles of the same measure will match up with one another.
When you say "crown cut" I think you are referring to a compound angle cut. A compound angle is 2 angles cut at the same time. In crown for instance you put the trim in the saw at a 45 degree angle, and tilt your saw blade at a 45 degree angle as well.
Cut a 45 degree angle "going the other way".
A 45 degree (Acute) angle.
A 45 degree cut.
Diagonal of a square?
Make a 45 degree cut like you would for an inside corner. This will show the profile of the trim. Use a coping saw to cut down the profile. Angle the cut back a bit so that only the profile edge will meet the adjoining piece of trim.
A right angle is 90 degrees. That's like cutting straight across. A 45 degree angle is exactly half of that. Cut on the diagonal.
45 degree angle
Yes, there is a 45 degree angle, and it is known as an acute angle.
You set the bevel on your saw to a 45 degree angle. Then set the angle on your saw base to the angle of your plumb cut.
lay out the pattern on a 45" degree angle on .cloth
90 - 45 = 45 So another 45 degree angle is the complement of a 45 degree angle.