simple.wikipedia.org/wiki/Ruler

A ruler (or 'rule') is an instrument of measurement. Rulers measure length. ... For
example, there are 1 metre rulers, 30 centimetre rulers, 20 centimetre rulers ...

www.mathatube.com/measurement-reading-a-ruler-starderd-unite.html

How to read a standard ruler. ... A ruler is use to measure units of length, inches,
feet ... example. The paper clip is of an inch long. Example of a standard ruler.

www.wikihow.com/Read-a-Ruler

For example, if you need to measure a nail, place one end directly on the left side
of the ruler. If it ends directly above the long line next to the large number 5, ...

www.ask.com/youtube?q=Example of a Measurement Ruler&v=6K4_j09EBss

Jun 25, 2014 ... Measuring segments with a ruler! Example 1 ... Measuring Lines in Inches and
Half Inches with a Ruler (Revised) - Duration: 9:50.

www.vendian.org/mncharity/dir3/paper_rulers/

"I discovered that many of my students do not really understand linear
measurement. I found this out when I gave them rulers without numbers. Some of
them ...

cyberbridge.mcb.harvard.edu/math_2.html

For example, you could measure the length of a leaf with a ruler that had
markings every centimeter (cm). In this example, illustrated below, the leaf is
longer ...

www.regentsprep.org/regents/math/algebra/am3/LError.htm

Another word for this variation - or uncertainty in measurement - is "error. ... For
example, if a measurement made with a metric ruler is 5.6 cm and the ruler has a
...

shp.utmb.edu/sahs/pellinore/intro_to_research/wad/bas_meas.htm

There are four scales of measurement and being able to discern which scale to
use is paramount in .... For example: what is a valid measure of height (a ruler?) ...

www.carllswoodproducts.com/tapemeasure.html

The example above shows the markings in 1/16 increments on just about any
rule or tape measure. This is very basic and easy to understand for many of us
but ...

printable-ruler.net/

Due to the easy fold mechanism on the sides, the paper ruler can be used for
measuring and drawing as well. To get your own printable ruler, just follow the
print ...