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“The equal internal bisectors theorem, 1840-1940. … Many solutions or none?” A centenary account
Published online by Cambridge University Press: 31 October 2008
Extract
This paper contains (i) a short history of the geometrical theorem proposed in 1840 by Prof. Lehmus of Berlin to Jacob Steiner—“If BJY, CJZ are equal bisectors of the base angles of a triangle ABC, then AB equals AC,” (ii) a selection of some half-dozen solutions from the 50 or 60 that have been given, (iii) some discussion of the logical points raised, and (iv) a list of references to the extensive literature of the subject.
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- Research Article
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- Copyright
- Copyright © Edinburgh Mathematical Society 1943
References
REFERENCES (A Selection)
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