Use a deck (or several - the local dollar store has the 2/$1) of standard playing cards. I only use A - 9 to ensure both all angles stay acute.
I have used this activity as a chance for extra credit after the students get done with their work, or as a group activity during review...really for anything.
The only thing I require the kids turn in other than the filled-out charts is a piece of notebook paper with their drawings and work.
First two pages are students' handout, page 3 is answer key to example
PS - there are a ton of combinations to check, so I have also made an Excel sheet where you can choose the cards from a drop-down and have the CPU do the work for you.