Recently finished up a unit on parallel lines and transversals and used this as an alternative assessment. I found this four years ago somewhere and have modified it and added reflection questions to it. I have no idea where I found this so let me know if I can give credit to somebody.
Until then, I'm taking partial credit. :)
I used a checklist to grade because I was too lazy to create a nicely done rubric.
Here are some student samples:
