Biometrika 1969 56(3):689-690; doi:10.1093/biomet/56.3.689
© 1969 by Biometrika Trust
The probability that a random triangle is obtuse
ERIC LANGFORD *
Naval Postgraduate School Monterey, California
This paper gives an expression for P(L), the probability that three points chosen at random in a rectangle with dimensions 1 × L form an obtuse triangle. By at random we mean uniformly and independently in each co-ordinate.

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