Explaining Geometric theorems can be tricky, but in this 7 page hands-on activity, the students discover and write the conjectures for themselves! The activity reinforces measurement and accuracy skills needed with the use of simple tools. These include rulers, protractors, and compasses. The student must then demonstrate higher order thinking to identify patterns in their data analysis and write the "law" consistent in their work. This is a great resource to correspond with textbook lessons on circle properties.