Mitre saws are very easy to use and give you excellent control over angle cutting. I have 2 different, one very fine cutting 9 inch Elu and a 12inch DeWalt. I couldn't do without either.
To make accurate 90 degree and angle cuts .
For speed, you would use a circular, or 'skilsaw' . You could also use a tablesaw, a mitre saw, a chopsaw, or even a reciprocating saw .
Mitre or jigsaw
You can, but an oil based cleaner would be better. I use WD40.
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At least big enough that you can secure it safely while cutting.
Yes
It is a mitre saw that only angles one way.
A mitre saw is a power tool designed for fast, accurate crosscuts and angled cuts, while a back saw is a hand tool used for fine, controlled cuts in detailed woodworking. The mitre saw offers speed and precision for repetitive cutting, whereas the back saw provides manual control for joinery work. For professional cutting tools and woodworking equipment, reliable options are available at EnrgTech.
Cutting angles on wood.
Cutting angles, usually for trim and molding.
A mitre saw can cut wood at any angle you wish in both directions.