We are given a triangle and asked to order the angles from smallest to largest.
In a triangle, the largest angle is always across the longest side.
Similarly, the smallest angle is always across the shortest side.
Refer to the figure below,
The shortest side is 8.7 so the angle across this side will be the smallest that is angle C (drawn in red)
Then we have the side 8.8 so the angle across this side will be larger than the previous one and that is angle A (drawn in blue)
The longest side is 9.1 so the angle across this side will be the largest that is angle B (drawn in green)
Therefore, the order of the angles from smallest to largest is
Angle C, Angle A, Angle B