Step 2: Print and cut
Once you've printed them out, cut out around the whole shape and the little black line in the middle.
Note: the file looks different because I updated it with the instructions on the page itself.
Also, I made the template as big as I could for a letter-size piece of paper. This makes a big star, about 17" wide. Since others would likely want smaller stars, I also made 2 other PDFs at 66% (11.5") and 50% (8.5") the size of the original. This allows for more pieces to be printed on each sheet.