It incorporates collaboration and finding mistakes (there is no way that all groups will do this correctly on the first try). I suspect some will struggle finding the group with the same question as them, but they will learn to follow instructions better (hopefully).
Here are the questions, linked here, that I will cut into strips for them.
I have 28 students, so 14 pairs which means that I needed 7 questions in order for each question to be repeated. Two groups will eventually find the centroid (via equations of medians), two will find an orthocentre and three will find a circumcentre.
If you can think of ways of improving this, please let me know in the comments!