Larry Eifler, Noah H. Rhee. The n-Dimensional Pythagorean Theorem via the Divergence Theorem. The American Mathematical Monthly, 115(5):456-457, 2008. [doi]
@article{EiflerR08,
title = {The n-Dimensional Pythagorean Theorem via the Divergence Theorem},
author = {Larry Eifler and Noah H. Rhee},
year = {2008},
url = {http://www.jstor.org/stable/27642508},
researchr = {https://researchr.org/publication/EiflerR08},
cites = {0},
citedby = {0},
journal = {The American Mathematical Monthly},
volume = {115},
number = {5},
pages = {456-457},
}