RECORD: Darwin, C. R. n.d. [illustration of hexagon, annotated]. CUL-DAR48.B46. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed and edited by John van Wyhe. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library & William Huxley Darwin.
B46
[sketch]
CB = R = 1 (& one side of hexagon = radius
CC' = R√2 = 1.414
EF = 1/2 FG = side of hexagon
EF = EC x tang 30° = EC x 1/√3
EC = √2/2
2EF = FG = √2/√3 = .8165
one side of Hexagon in circle equals radices of circle.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 28 November, 2025