via the comic artistry and dry wit of Randall Munroe, resident at XKCD! XKCD 'Useful Geometry Formulas' → September 01, 2021 by Marc Handelman in XKCD, Randall Munroe, Satire, Sarcasm, Mathematics Humor, Geometry Humor
via the comic delivery system monikered Randall Munroe resident at XKCD! XKCD 'Circles' → March 13, 2021 by Marc Handelman in XKCD, Randall Munr, Satire, Sarcasm, Geometry Humor