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FutureStarrHow to Calculate Length
Do you ever straighten a piece of paper, only to wonder how long it is? When should you know? With these easy-to-follow instructions, made for quick reference, you can figure out the length of a piece of paper, average length, and more with ease.
If you know the length and width of a rectangle, you can figure out its area. These two quantities are independent, though, so you can't do a reverse calculation and determine both of them if you know only the area. You can calculate one if you know the other, and you can find both of them in the special case in which they are equal – which makes the shape a square. If you also know the perimeter of the rectangle, you can use that information to find two possible values for length and width.
Once the measurements for length and width have been entered, along with the preferred units for each parameter, the calculated area value will be shown in the answer box highlighted in red. Also a graphic will be shown of a scaled drawing to the correct proportions and labelled with each dimension and calculated area. (Source: www.sensorsone.com)
Measure the length of the area you’re measuring. Square metres are a unit for measuring area or the size of a two-dimensional object such as a floor or a field. Use your measuring tool to measure one side of the object, from one corner to the other. Write down the result.
Unless the object you’re measuring is much smaller than 1 metre, you can round to the nearest centimetre when making your measurements. For instance, if the width is slightly past the 1 metre 8-centimetre mark, just use “1m 8cm” as your measurement, without using decimals or millimetre measurements. (Source: grassfactory.co.za)