inches
Pencil lead is very narrow. Millimeter can be used to measure it.
METERS!!!The unit of measurement you would use to measure the width of your classroom is meters.
You can measure small lengths in millimeters. Length of a pencil, pen, eraser, length and width of a paper, sheet etc. can be measured in millimeters.
Centimetre.
Parsecs
you would use a ruler to measure a computer screen.
a ruler
Millimetres
The length and width would be equal to 22^2 = length^2 + width^2 444 = length^2 + width^2 Assuming the screen is a square, then 444 = 2length^2 222 = length^2 root(222) = length = width
Identify the SI until you would use the measured the width of your classroom
15 m
a yard stick