Well, I think it means "almost same" in Latin so since its almost the same as a square that's where the name originally is
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It is a hexahedron, each of whose faces is a rectangle.
A rectangle is classed as a 4 sided quadrilateral in math.
a= l x wp= 2l + 2w
well, area means the inside e of something exterior of any figure and length times with is the area of an rectangle.
it looks like a rectangle with to of the points/vertices caved in