Twenty sided ball made from greeting cards

Step 4 Mark the circles

All the previous nonsense was so you can use the template you just made to mark all the circles quickly for their scoring and folding. Place a circle on your template and make a small mark on the circle where the folds should be. Yes, my template is different. Trying to use the silly compass to make an equilateral triangle just didn't work out. For each of the 20 circles, mark all three points.