I'm proud of this puzzle sheet I just made, and I like the self correcting aspect of these things. I think that if I had 20 more hours each day, I could spend my time making these types of things up. Notice that it basically has the exact same pictures from the previous sheet, but now the students have to place the vertices in order and determine what type of triangle congruence it is.
After we had our day of constructing triangles in geometry to see if they were all congruent or not, and after we discussed how to read information, then I had the kids learn about the various postulates and theorems (SAS, SSS, ...). THEN they're ready for this puzzle just to see if they can piece things together. If they complete the congruence statement with the triangle vertices in the right order, and if they correctly place them on the blanks at the bottom, then an interesting fact appears. (UPDATE: yeesh! There was a typo on the picture in #10, but it's fixed now in the download.)