Length is a measure of how long
something is from end to end. This
may include distance, which
means the space between two points or objects.
When you measure the distance
around an object, this gives you the perimeter. Units are used to measure the length
and distance. There are two systems
of measurement: the Metric System
and 



When
To Use Which Type Of Unit




To
measure very short lengths, such as the length of your thumb or one
of your toes, we usually use centimeters or inches. When
we want to measure longer lengths or distances, we usually use meters,
feet, or yards. Some examples
would be the height of a fence or the length of a football field. When we measure longer distances, we use kilometers or miles, like measuring the distance from your house to your school or the height of a tall mountain. 



Table
of Length Conversions



Metric System

