Hardy–Weinberg frequency as a function of p. A<unk>  is a ternary plot used in population genetics. It is named after the Italian statistician Bruno<unk><unk>  (1906–1985) and is used to graph the genotype frequencies of populations, where there are two alleles and the population is diploid. It is based on an equilateral triangle, and Viviani's theorem: the sum of the perpendicular distances from any interior point to the sides of said triangle is a constant equal to the length of the triangle's altitude.
De Finetti diagram
Darrow Yannet diagram
Jaeger chart
Barber–Johnson diagram
Wiggers diagram
Lund and Browder chart
Monoyer chart
Schenck classification