In a triangle, the length of a side is directly related to the measure of the angle opposite to it. The greater the angle, the longer the side opposite to that angle.
For triangle ABC:
- Angle A = 55 degrees
- Angle B = 65 degrees
- Angle C = 60 degrees
The side lengths are opposite to these angles:
- Side BC is opposite to angle A (55 degrees)
- Side AC is opposite to angle B (65 degrees)
- Side AB is opposite to angle C (60 degrees)
Since angle B (65 degrees) is the largest angle, the side opposite to angle B, which is side AC, will have the greatest length.
Therefore, the correct answer is:
B. line segment AC