Dissection of a Spherical Equilateral Triangle into Three Isosceles Triangles

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


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An analogous construction in the plane gives three equilateral triangles.
[1] G. N. Frederickson, Dissections: Plane & Fancy, New York: Cambridge University Press, 2002 p. 43.
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