Finding length of AB with ruler


We measure AB

& AB = 6.5 cm

But , there can be errors……..


We might have difficulty reading over the marks in the pointer


We can also have positioning error


Positioning error

Finding length via ruler - Part 2

If our eyes are not vertically on top of the object,

we may get errors due to angular viewing.


So, how do we get rid of such errors?

We use a divider.   

Finding length via ruler - Part 3


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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.