Inches or centimeters
You would use millimetres.
I would suggest centimeters but lots of people use inches.
It depends on what you are measuring the width of. Different units and different tools would be appropriate for a hair, a car or a galaxy.
Yards if you work in imperial units or metres if you work in metric units
You would multiply the length by the width.
You can invent any number of nonstandard units, but none of them is "best". It is best to use standard units, that is, the meter.
For the diameter of hair the best unit is micrometre.
It depends on what is being measured. The instruments and units used for measuring the length, width and height of a building would be different to those used for a matchbox!
The metric units would be centimeters. The formula would be the length X width X height.
METERS!!!The unit of measurement you would use to measure the width of your classroom is meters.
That would depend on the size of whatever it is you're measuring.
You would use feet or yards to measure the width of a street.
The system of units scientist use to measure the properties of matter are the SI units.
i think it is to measure units of a square
The 2 units that scientist use to measure temperature are Celcius and Fahrenheit.
The SI unit I would use to measure the width of my classroom is with meters because meters are used to measure distance.
Measure the height the width and length of the box and multiply HxWxL. Whatever units you use to measure the volume will be cubic, metres/centimetres/millimetres etc. Volume can be written as cm3 m3 mm3 For a box Height = .5m, length =1.5m, width = 1m the volume = .5x1.5x1 = .75 cubic metres