I'm working on adding internal lighting to my pantry, and have discovered that the LED strips really only work when held at a 45 degree angle to the bottom of a shelf. I'd like to get a dowel rod and cut it into two dowel rods, each being a right triangle in cross-section, such that I could attach the led strips to the hypotenuse of that triangle. I have some woodworking tools from my dad (skill saw, circular saw, miter saw, reciprocating saw), but little to no experience beyond "saw this 2x4" or "cut this plywood to this size"
I think if I tried to use any of these tools, I would probably not get a decently straight line down the dowel, so I'm hesitant to try. What tools could I use to rip this dowel rod in this way? That being said, I'm not really interested in wood working as a hobby, so I don't want to invest in the most expensive way to accomplish this task, I'd like to do it with either the tools I have or relatively inexpensive tools. I'd like to avoid going out and buying say, a table saw.
For reference, I'm using a 1/2" square dowel that I will be cutting to 12'' long.