Ordering sides and angles of a Triangle. Visualize a triangle. The sides lengths of each angle are known, but you don’t know their measurements. Can you identify its longest side, please? What if you were given only the lengths of each side and no angle measurement? What if you were given the side lengths and no angle measure? Can you find the largest angle? It’s easy to determine the largest angle if you know how the sides of triangles relate. Theres no big deal remembering it: the largest angle of the triangle is opposite to its longest side and the smallest angle is opposite to the shortest side. This printable worksheet will help you teach high school students how to apply this principle and arrange the sides and angles for triangles. Take a look at our worksheet to get started.