Hexagon triangle picking considers a triangle formed by three points chosen independently and uniformly inside
a regular hexagon of unit area.
The mean triangle area is (Woolhouse 1867, Pfiefer 1989). This is a special
case of a general polygon triangle picking
result due to Alikoski (1939).
Alikoski, H. A. "Über das Sylvestersche Vierpunktproblem." Ann. Acad. Sci. Fenn.51, No. 7, 1-10, 1939.Pfiefer,
R. E. "The Historical Development of J. J. Sylvester's Four Point
Problem." Math. Mag.62, 309-317, 1989.Philip, J.
"The Area of a Random Triangle in a Regular Hexagon." Stockholm, Sweden:
KTH Royal Institute of Technology, 2010. https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-127518.Solomon,
H. Geometric
Probability. Philadelphia, PA: SIAM, p. 114, 1978.Woolhouse,
W. S. B. "Question 2471" Mathematical Questions, with Their
Solutions, from the Educational Times, Vol. 8. London, England: F. Hodgson
and Son, pp. 100-105, 1867.