14 Feb
2016
14 Feb
'16
3:44 p.m.
Minor point: The URL has to be copied and pasted since it didn't all make it into the linky stuff. Also, I think this might make the point more clearly if it began with a picture of the unduly skewly paralleluly. —Dan
On Feb 14, 2016, at 1:33 PM, Bill Gosper <billgosper@gmail.com> wrote:
Remember when they taught you that the area of a triangle is half the area of the parallelogram you get by gluing two copies together? And the area of the parallelogram is the area of the rectangle you get by chopping a triangle off one end and gluing it on the other? Did anybody complain that this doesn't work for sufficiently skewed parallelograms? Fix: gosper.org/A=f <http://gosper.org/A=f>(bh).gif --rwg