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MatematikaRia.com


Metric Area
These are the most common measurements of area (from smallest to largest):
 Square Millimeter
 Square Centimeter
 Square Meter
 Hectare
 Square Kilometer

Square Meter
The square meter is the
basic unit of area of the Metric System
Area is length by length, so a square that is 1 meter on each side is 1 square meter.
You could have othe shapes (such as a rectangle that is ½ a meter by 2 meters) that also make 1 square meter.
The Unit is meters × meters, which is written m^{2} (square meters).
Example: How big is this rectangle?
It is 2 meters by 3 meters, so it is 2 m × 3 m = 6 m^{2}
Square Millimeter
A square millimeter is millimeters × millimeters, which is written mm^{2}.
A millimeter is onethousandth of a meter (^{1}/_{1000} meter), so a square millimeter is also:
1 
× 
1 
= 
1 
of a square meter 



1,000 
1,000 
1,000,000 
In other words a square millimeter is onemillionth of a square meter.
So, a square meter has 1,000,000 square millimeters.
Square Centimeter
A square centimeter is centimeter × centimeter, which is written cm^{2}.
A centimeter is onehundredth of a meter (^{1}/_{100} meter), so a square centimeter is also:
1 
× 
1 
= 
1 
of a square meter 



100 
100 
10,000 
In other words a square centimeter is onetenthousandth of a square meter.
So a square meter has 10,000 square centimeters.

Hectare
A hectare (ha) is an area equal to a square that is 100 meters on each side.
So a hectare has 100 m × 100 m = 10,000 m^{2} (square meters).
Hectares are commonly used to measure land.

Square Kilometer
A square kilometer is kilometer × kilometer, which is written km^{2}.
A kilometer is a thousand meters, so a square kilometer is also:
1,000 m × 1,000 m = 1,000,000 m^{2} (square meters).
In other words a square kilometer is onemillion square meters.
Square kilometers are commonly used to measure large areas of land.
Some Examples
A square meter is about:
 half the area of a doorway
A hectare is about:
 two and a half acres
 2.471 acres (to 3 decimal places)
 100,000 square feet
 more precisely 107,639 square feet


