5. Each side of a square measures 65 m 9 dm.
Find its area. By how many square metres
does it fall short of a hectare?
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To find the Area of a quadrilateral, you always multiply Length * Width. In the case of a square, all sides are the same length, so you simply multiply 65.5* 65.5. The reason you can use 65.5 is that there are 10 decimeters in one meter, so if you convert decimeters to meters you have 5/10 of a meter.
This is a two-step problem. After you have found the Area of the square, you must then subtract it from 10,000 which is how many square meters are in a hectare.
Your problem will look like this:
65.5*65.5 = A of square
10,000 - A = X sq meters
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