# Dissection of a Spherical Equilateral Triangle into Three Isosceles Triangles

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This Demonstration shows a dissection of a spherical equilateral triangle into three congruent spherical isosceles triangles.

Contributed by: Izidor Hafner (March 2017)

Open content licensed under CC BY-NC-SA

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An analogous construction in the plane gives three equilateral triangles.

Reference

[1] G. N. Frederickson, *Dissections: Plane & Fancy*, New York: Cambridge University Press, 2002 p. 43.