write 3 lines-
Q-why is it better to use a divider than a ruler while using measuring the length of a line segment?
Kindly refer the similar link for your query.
https://www.meritnation.com/ask-answer/question/why-is-it-better-to-use-divider-than-ruler-while-measuring-t/understanding-elementary-shapes/9541447
It is better to use a divider than a ruler, because the thickness of the ruler may cause difficulties in reading off her length. However divider gives up accurate measurement.
Regards