Why is the Pythagorean Theorem used for error calculation?
88363
Why is propagation of uncertainties quadratic rather than linear?
57053
Is being a right triangle both necessary and sufficient for the Pythagorean Theorem to hold?
7241
Areas versus volumes of revolution: why does the area require approximation by a cone?
73805
How can we get Pythagoras from the Parallelogram law?
113516
Why can we only add or subtract things of the same dimension (meters/second, newtons, etc)?
59274
Why do cost functions use the square error?
58249
Why do we use a Least Squares fit?
80705
Why divide by $n-2$ for residual standard errors
84018
Why is there not a simpler way to calculate the standard deviation?
48879
Why do mathematicians use single-letter variables?
11949
How does the standard error work?
104410
Why do we omit the negative sign when finding basic angle when solving trigonometric equations?
66227
Why Euler's formula is true?
59908
Intuitive Explanation why the Fundamental Theorem of Algebra fails for infinite sums
136318
Where does the power $2$ come from in the Pythagorean theorem?
116283
How to properly interpret a seemingly contradictory result in Mathematica?
33518
An error formula for linearization