Students practiceusing the Triangle Proportionality Theorem by using ratios to find missing sides in this matching activity to use in a variety of ways. Cut apart and use for a single student or pair of students or use as a station/group activity. The set includes 18 pairs of cards, one side with the diagram of the triangle and the other side with the calculated side measure. You can also use these cards as a ticket in the door or ticket out the door. Additional uses for these cards are explained in the directions or download my free resource.