Question

What are the Precautions to be taken while measuring ??

Answer 1

that the selected points should be length
the scale should not be out of points

Answer 2

Answer:

Care should be taken to keep the ruler along the lenght of the object.

If the edge of the ruler is worn out or broken, the measurement should be srarted from any other mark that is fully clear. ...

Eyes should be exactly obve the point where the measurement is to be taken