Åk 6–9

English
 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 dm2. 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 dm2? How many dm2 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 cm2. 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.