منابع مشابه
The envelope of the Wallace-Simson lines of a triangle. A simple proof of the Steiner theorem on the deltoid
A simple proof is presented of a famous, and difficult, theorem by Jakob Steiner. By means of a straightforward transformation of the triangle, the proof of the theorem is reduced to the case of the equilateral triangle. Several relations of the Steiner deltoid with the Feuerbach circle and the Morley triangle appear then as obvious. La envolvente de las rectas de Wallace-Simson de un triángulo...
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ژورنال
عنوان ژورنال: The Mathematical Gazette
سال: 1918
ISSN: 0025-5572,2056-6328
DOI: 10.2307/3602069