I give this to the students (printed in A4 or A5 depending on how much room they need) at the end of the lesson to assess an overview of the lesson. I mark it as soon as I can (ha) and it allows me to spot any misconceptions. The last question is a challenge one to push the most able students.

This is all of the geometry exit tickets that I have created - I will update as I add more. I've updated it and added answers where possible!