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A zillion means infinite millions and the symbol for infinity looks like an elongated 8 on its side. The symbol was introduced by the English mathematician John Wallis in 1655 who derived it from the Roman numeral (I) which also meant myriad (countless numbers)
It looks like the number 8 lying on its side. There is a symbol for it on most keyboard insert symbols, but not on this site. So look at the number 8 and tilt your head 90 degrees or lie on your side and that's it!
The Greek letter mu, in lower case, followed by a lower-case M. A mu looks like a u with a straight line coming down off the left-hand side.
It is a parallelogram.
The difference is 90 degrees.The side view looks like a triangle.The top view looks like a rectangle with its diagonals.