Use this engaging Tarsia domino card puzzle to help students learn trigonometry ratios and Pythagoras. Problems use the standard triangle ABC, with sides a, b, and c.Students do a lot of thinking and learning and solve many problems as less writing needed. Working in small groups works really well as there is the shared goal of completing the puzzle. All students contribute as they all work at the same time and at their own pace on the same or different pieces. The activity also encourages maths