cross-posted from: https://lemmy.world/post/27589038
this post was submitted on 31 Mar 2025
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To a mathematician, pi is 3.1415926535897932384626433832795028841971693993
To an engineer, pi is 3
The joke is basically the same, since you get resistors in certain values, and it's necessary to select the value closest to the one you need
No, to an engineer pi is 22/7, 355/113 if your tolerances are really tight. 3 is pi to a theologist, because that's what the Bible uses.
Maybe round it up to 4 just to be safe.......
I mean, depending on your calculations and scale, you might go a little more precise with it. At a diameter of, say, 10m for a semicircular bridge arc, that's a difference of 0.7m.
(For mathematicians, the difference will be 0.00796m and then some I can't be arsed to write out, but compared to the total arc of 15.7m, that'd be a deviation of 0.05% which is basically zero anyway)