Leo designs a piece of jewelry in the shape of a regular pentagon. Each side of the object measure 3 centimeters. Leo photographs the object, enlarges it so that the sides each measure 8 centimeters, and prints the photo. What scale factor did Leo use to create the photograph from the original?
The original pentagon has side length 3 centimeters. The enlarged pentagon has side length 8 centimeters. To find the scale factor, we will divide the length of the enlarged pentagon's side by the length of the original pentagon's side: 8 cm / 3 cm = <<8/3=2.6666666666666665>>2.67.
Therefore, Leo used a scale factor of 2.67 to create the photograph from the original. Answer: \boxed{2.67}.