Check out this five prompt geomtry challenge. It can be used for a group or be done independently. Each of the challenges push students to create a quesiton of their own based on the topic provided which include polygons, triangles, 3-dimensional shapes and more. The prompt tells students the questions are to be test-type questions but adapt as needed. The idea is that students think through creating problems as well as the answer key to the topics they have learned. This serves as a great review come testing time!