In metric, you would use square meters and/or square centimeters, depending on how large your table is. In America one might use square inches or square feet.
Square kilometres.
Metres, to measure its length or width, square metres to measure its area.
Any unit of area, such as square meters, hectares, square kilometers, etc.
21 grams
you would probably use feet and inches
Cubic kilometres.
This depends on what unit you are using to measure in. However, area will always be measure in (unit)^2.
A metres, for an approximate measure, a centimetre for a more accurate measure.
You would use area. I would use the meter2. Okay
kilograms
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.
Square metre.
metres
square inches
Square kilometres.
centimeter
Square feet. ************************* I would use centimetres to give the area in square centimetres.