Which of the following methods is the best way to compare the lengths of two line segments?
Comparison using a ruler and divider
The best method to compare the lengths of two line segments is by using a ruler and divider. Keeping the two needles of the divider at the ends of a line segment, and then placing it besides a ruler gives the most accurate measurement of the line segment, provided that the divider's arms are not disturbed in the process once they've been fixed at the ends of the line segment.