Question

what is the disadvantage in comparing line segment by mere observation ?​

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.

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Answer 2

Answer:

When we compare two line segments of almost same lengths, we cannot be sure about the line segment of greater length. Therefore, it's not an appropriate method to compare line segments having a slight difference between their lengths. This is the disadvantage in comparing line segments by mere observation.

Hope it helps you