Size distributions in random triangles

D. J. Daley, Sven Ebert, R. J. Swift
2014 Journal of Applied Probability  
The random triangles discussed in this paper are defined by having the directions of their sides independent and uniformly distributed on (0, π). To fix the scale, one side chosen arbitrarily is assigned unit length; let a and b denote the lengths of the other sides. We find the density functions of a / b, max{a, b}, min{a, b}, and of the area of the triangle, the first three explicitly and the last as an elliptic integral. The first two density functions, with supports in (0, ∞) and (½, ∞),
more » ... pectively, are unusual in having an infinite spike at 1 which is interior to their ranges (the triangle is then isosceles).
doi:10.1239/jap/1417528481 fatcat:wlln54qyrzcchcvhafceep6yn4