This set of 20 task cards is perfect to help your students practice classifying triangles. Whether your students are learning about triangles for the first time, or they need a review, these task cards are a great tool to help solidify knowledge. The task cards expose students to several different types of problems. Some show pictures and some have written descriptions of triangles. The pictures of triangles not only show angle measurements and side measurements, but some also show triangles with hatch marks to show congruent side lengths.