Challenge Solutions 
Hopefully you have been trying to solve the solutions to the different rectangles. As you probably noticed, all the the rectangles have areas of 60 square units since each of the 12 pentominos have an area of 5 square units each. Each of the rectangular shapes is extremely difficult to solve, but many students have solved each of them. The site that is linked below can solve each of the puzzles if you need help. Before you use the site, take a look at some helpful hints that will make suing the site easier. Click on Pentominos Puzzle Solver site to get started. Once the site is open:
