Article contents
History of a theorem in Elementary Geometry
Published online by Cambridge University Press: 20 January 2009
Extract
The theorem is
If the straight lines bisecting the angles at the base of a triangle and terminated by the opposite sides be equal, the triangle is isosceles.
This theorem was in the year 1840 communicated by Professor Lehmus of Berlin to Jacob Steiner with a request for a pure geometrical proof of it. The request was complied with at the time, but Steiner's proof was not published till some years later.
- Type
- Research Article
- Information
- Copyright
- Copyright © Edinburgh Mathematical Society 1901
- 4
- Cited by