Yes. Because it is the closest measure to the algebraic expression.
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You could measure a small area.
I would use a tape measure. This would require one person to help me, since the tape measure would have to be held at both ends. Even if the classroom is longer than the tape measure, I could just mark the full extent of the tape and then measure again from there.
METERS!!!The unit of measurement you would use to measure the width of your classroom is meters.
The typical door in a classroom is about 2 meters, or two yards and 1/3.
With a tape measure or a yard stick.