Millimeters
To find the area of a book cover in metric units, the most appropriate unit to use would be centimeters. The formula for finding the area of a book cover would be: length x width.
Square metres
The square meter is the metric (International) unit of area. Google gives 1 acre as 4046.86 sq. meters.
The metric unit for distance/length is the metre, but what kind of formula are you asking for?
There is NO comparison. Metres is the METRIC measure of LENGTH Square Yards is the IMPERIAL measure of AREA.
Square centimetres (cm2).
Any square unit you like can be used to measure the area of a postcard, however to make the numbers have a reasonable size and ease of handling, I would suggest using square centimetres as a postcard is about hand size (and likely to be about 15cm by 10cm).
I would use the metric unit is inches
no, Acres is an Imperial Unit for the measure of area. The metric unit for area is the square meter.
metres
centimeter
metres
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.
To find the area of a book cover in metric units, the most appropriate unit to use would be centimeters. The formula for finding the area of a book cover would be: length x width.
Square metres
Square meters.
square meter