The numbers 1.3, 2.6, and 2.7 represent the side lengths of the triangle. More specifically, side QR is 1.3 units, side RS is 2.7 units, and side QS is 2.6 units.When you are listing the angles of the triangle in order from smallest to greatest, all you need to do is to look at a side, then look at the angle directly across from it. You may not be able to determine the actual measure of the angle, but you can assume that the angle across from the smallest side of the triangle is the smallest angle, the angle across from the 2nd largest side is the 2nd largest angle, and the angle across from the largest side is the largest angle. For example, angle S is across from side QR. Since QR is the shortest side, the measure of angle S is smallest as well.With this particular problems, the measure of angle S is smallest, the measure of angle R is the next greatest, and the measure of angle Q is the greatest of all three.