[dylan604]

> Triangular shapes are quite rare in human spaces Not a football fan, eh? Triangles are the essential building block for breaking down defenses. </bad_joke>

As for what you actually meant, triangles (and other variations of 3) play a very import role in visual design. Admittedly, these might not be obvious to most. I know you really meant physical items. However, it might be a style of design of a more modern era. I have a glass coffee table that has a triangular raised extension, from the 50s I believe. I also have a round two tier table, built by my grandfather in the 50s as well. The top tier sits on an X shaped pier with 90 degree notches cut out of the verticals leaving a very distinct triangular shape, plus the gaps of the X shape as well. Just from memory, the cars from the 50s had lots of triangular shapes/markings, specifically thinking of the fins. I wonder why the triangle seems to have fallen out of favor?