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11C aspect ratio

Posted by Dave Chapman on 27 July 2005, 1:31 p.m.

I had an 11C at work in 1986, and I was not allowed to take it on a 2-year posting overseas, so I bought my own. It cost $100 Canadian at the time. It is my favorite all-time calculator! When I returned, my old 11C was up for grabs, everyone else having moved on to a more advanced model. Now I have two: one at work and one at home! Beautiful instruments, still going strong.

Has anyone mentioned that the shape of the 11C and similar calculators is very close to the Golden Ratio, (Sqrt[5]+1)/2, also called the Divine Proportion?


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