Identifying Hypotenuse, Adjacent, and Opposite Sides Card Sort and Ratios Activity:This card sort activity will help you teach your students how to recognize the different sides of a right triangle and how to find sine, cosine, and tangent of right triangles. This activity should be used on the first or second day after students have been introduced to right triangle trigonometry. It is particularly helpful with groups of students who struggle with correctly labeling the sides of right triangles