While measuring the length of a line segment following precaution should be taken: (a) The ruler should be placed exactly on the length to be measured. (b) One should not use worn out portions of the instrument. (c) Eyes should be kept vertically above the point to be measured.
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sorry don't know but thanks for free points
Answer:
While measuring the length of a line segment following precaution should be taken: (a) The ruler should be placed exactly on the length to be measured. (b) One should not use worn out portions of the instrument. (c) Eyes should be kept vertically above the point to be measured.