Question

1. What is the disadvantage in comparing line
segments by mere observation?​

Answer 1

Answer:

When we compare two line segments of almost same lengths, we cannot be sure about the line segment of greater length. Therefore, this is the disadvantage in comparing line segments by mere observation.

Answer 2

$\huge\mathbb\red{Answer:-}$

By mere observation we can’t compare the line segments with slight difference in their length. We can’t say which line segment is of greater length. Hence, the chances of errors due to improper viewing are more.