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yes, in the same way the cartridge razors are a lot more efficient for those who lack the skills to use something better.

Actually the change in the hypotenuse is a second order effect, so it's negligible, the errors of the actual measurement are much larger.
The stretching of the tape can change the thickness...

i just noticed this thread.

i used octave, which is the free software analogue to matlab (matlab stands for matrix laboratory).

and to get just the numbers from glen's post i used mouse...