What is the 100 side lenght of the square area?

What is the 100 side lenght of the square area?
In the square are the 100 side is:
Either the length if it is the larger side or 100>X X would represent a smaller number than 100.
Or the width if it is the smaller side 100<X X in this case would represent the larger number.
100 can be the length and width if every side is 100.
100 could also be called the base if it is the bottom line in like a triangle.
100 could also be called the height if it is the distance between the top and bottom of a polygon like a triangle.
And finally the number 100 could be the actual area of the polygon for a square 100 would require the lw to be 10 on each side.