Linked from
The 14 pages that link to Square, each with the reason it gives.
HomeomorphismRelated: Its boundary has the same topological structure as a circle.
PerimeterBroader topic: Equal side lengths reduce its perimeter formula to four times one side.
PendentiveRelated: The pendentive begins at the corners of a square bay.
Vitruvian ManRelated: The body's placement within a square complements its fit within the circle.
KerchiefRelated: The square shape lets a kerchief fold into several useful forms.