Question

what is the disadvantage in comparing line segments by mere oberservation​

Answer 1

Answer:

When we compare two line segments of almost the same lengths, we cannot be sure about the line segment of greater length. Therefore, it is not an appropriate method to compare line segments having a slight difference between their lengths. 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.

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Answer 2

Answer:

When we compare two line segments of almost the same lengths, we cannot be sure about the line segment of greater length. ... Therefore, it is not an appropriate method to compare line segments having a slight difference between their lengths.