The square meter.
The metric unit of the meter would be the appropriate measure of the area of classroom. Calculating area involves multiplying the length (in meters) of the classroom's length and width. Area of the classroom would be in square (^2) meters.
The area of a classroom can be determines by multiplying the length times the width of the space in units. Those units will be marked as squared.
Surface area
Square units are used to measure the area of something.
Square units measure area.
Area is measured in square units.
Area is a measure of square units.
Area is measured in square units.
Square centimetres.
kilometer2
You would multiply the length by the width.
Square units measure area.