49 square meters
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The answer is 81m2A square with 9 meter sides has an area of 9*9 = 81 square meters.
In 620 square meters, there are no meters, as square meters are a unit of area, not length. Square meters measure the two-dimensional space within a shape, while meters measure length or distance. The square meter is the SI derived unit of area, with the symbol m², and it is defined as the area of a square with sides of one meter.
They are different. 100 sq metres is the area of a square of sides 10m or a rectangle of 20m x 5m or any random shape with an equivalent area: 100 sq metres. On the other hand, a 100 metre square is a square of sides 100m which would have an area of 10000 sq m (100 times as large).
A square meter is a measure of area, not volume.
There are 100 square decimeters in one square meter. This is because a square meter is a unit of area equal to a square with sides measuring one meter each, and a square decimeter is a unit of area equal to a square with sides measuring one decimeter (0.1 meters) each. Therefore, to convert from square meters to square decimeters, you multiply by 100.