2.3 Standard Units for Measuring Area
For people to be able to understand each other when comparing areas of difference places and surfaces, demands that there is a unit used to measure area. Here are the area measurements that we use in different situations.
1 square meter 1 m²
1 square meter is the measurement of a square where each side is 1 m.
Use: For example when you describe the size of a house.
Square meter are the basic unit for area.
How many square meters do you think your bed is?
How many people do you think can fit into a square meter?
How big is the room you’re sitting in?
1 square kilometer 1 km²
1 square kilometer is the measurement of area for a square where each side is 1 km.
Use: To describe the side of a country.
1 hectare 1 ha
1 hectare is a square where each side is 100 m.
Written as: 1 ha = 100 m x 100 m = 10,000 m²
Use: When expressing the size of fields or wooded land.
How many hectares is your school yard?
1 ar
1 ar a measurement of area of a square where each side is 10 m.
Written: 1 ar = 10 m x 10 m = 100 m².
Use: Not so often. Sometimes in land surveying and technical areas.
1 square decimeter 1 dm²
1 square decimeter is the measurement of area of a one square where each side is 1 dm.
(The picture may not be exactly 1 dm^{2}. It depends on your computer, its settings and your monitor.)
Use: Not so much in everyday life.
Can you say something that is about 1 dm^{2}?
How many dm^{2} is the area of your computer monitor?
1 square centimeter 1 cm²
1 square centimeter is a square where each side is 1 cm.
(The picture may not be exactly 1 cm^{2}. It depends on your computer, its settings and your monitor.)
How many square centimeters is your nail?
1 square millimeter 1 mm²
1 square millimeter is the measure of the area of a square where each side is 1 mm. |