Yards if you work in imperial units or metres if you work in metric units
Metres, but some of the lines may still be in terms of yards.
METERS!!!The unit of measurement you would use to measure the width of your classroom is meters.
ruler
meters
First: 36 cm2 cannot be a width. Width is a linear measure - a measure of distance - which would be measured in cm and not cm2. In any case, having just the width is not sufficient information for answering the question.
Metres, to measure its length or width, square metres to measure its area.
Metres, but some of the lines may still be in terms of yards.
METERS!!!The unit of measurement you would use to measure the width of your classroom is meters.
The base unit of length is the metre. You would use metres to measure a park. A Rugby pitch is roughly 100 metres long by 70 metres wide.
Centimetre.
Parsecs
a ruler
Millimetres
if you used Milimetres to measure a Football pitch it would take Years so you would you something more sensible and higher (Kilometres)
Identify the SI until you would use the measured the width of your classroom
15 m
a yard stick