Here are the steps to cut a 45-degree angle:

1. Place the protractor on the workpiece carefully.
2. Use your pencil to mark the 45-degree angle.
3. Make a cut mark with your handsaw.
4. Follow the mark and keep cutting until you get that nice mitered edge.

If you have an electric miter saw, you can use it to make the job easier. Here are the steps:

1. Set your combination square on the 45-degree mark and draw the cut line.
2. Adjust the miter saw to 45 degrees, align it to the cut line, and gently guide the saw into and through the wood.