Below are some pictures of my Distance and Midpoint Formula Foldable. I got this idea for the foldable from similar one I saw in a classroom last year. However, in the one I saw it was all handwritten by the student and it was only the formula, definition and one example for each on the inside. I added a visual representation as well as a second example. I also like that the students don't have to write down the examples.
As always leave a comment with any thoughts or questions and any feed back if you use this (or something similar) in your classroom!