Page 151 - Math Skill - 2

Measurement 149

Measuring Length

We can measure the length of objects by using our body parts.

A handspan A cubit A Footspan A Pace

We use a handspan, a cubit, a footspan and a pace to measure length.

But, these units are not accurate because we all have different size of

hands and feet.

To measure length correctly, fixed Fact-o-meter
units are used. These fixed units are Handspan, cubit, footspan and

called standard units. Standard units pace are called the non-standard
units of length. These units vary
like metre and centimetre are used to from person to person.
measure length.

Centimetre

Smaller lengths like lengths of pencil, toothbrush, etc. are measured in

centimetres. In short, centimetre is written as cm.

The length of pencil is about 11 cm. The length of tooth brush is about 14 cm.

Absorbing Facts
We use a ruler to measure length in cm.
The ruler in our geometry
It has centimetre marks on one side. box is 15 cm long.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
cm
inch
1
2
0
Using Ruler to Measure the Length 3 4 5 6
To measure the length of an object, put one end of the object to be
measured at ‘zero’ mark of the ruler. The marking at the other end gives
the length of the object.