# Dissecting One Isonona Triangle into Two

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An isonona triangle is one of the following four kinds of isosceles triangles: a triangle with two equal angles of , , or . Each can be dissected into isosceles isonona triangles.

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Contributed by: Izidor Hafner (December 2020)

Open content licensed under CC BY-NC-SA

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The term *isonona* is introduced in the same way as the term *isohepta* [1, p. 218].

Reference

[1] G. N. Frederickson, *Dissections: Plane & Fancy*, New York: Cambridge University Press, 1997 p. 218.

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