The square is one base element

General case

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Segments in the general case

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The side length of the square  

Perimeters in the general case

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Perimeter of base square 

Areas in the general case

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Area of the base square  

Centroids in the general case

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By definition the centroid points of a base shape are  . Relatively is the lower left point of the base of the square is at:
 

Normalised case

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In the normalised case the area of the base is set to 1.
 

Segments in the normalised case

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Segment of the base square  

Perimeters in the normalised case

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Perimeter of base square:  

Areas in the normalised case

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Area of the base square  

Centroids in the normalised case

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The position of the lower left point of the base of the square:  

Identifying number

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Apart of the base element there is no other shape allocated. Therefore the integer part of the identifying number is 0.
The decimal part of the identifying number is the decimal part of the sum of the perimeters and the distances of the centroids in the normalised case.

 

So the identifying number is: