If you want to make a bevel joint with a really neat finish, cover the sawing lines with a strip of masking tape. That will reduce splintering of the material and give you a cleaner and straighter cut.
If you want to make a neatly finished angled joint between two pieces of wood, you need to bevel the two ends to be joined.
What tools do you need?
There are different tools that you can use for this job.