Forum Geometricorum
Volume 6
(2006)
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1. Khoa Lu Nguyen and Juan Carlos
Salazar, On the mixtilinear
incircles and excircles, 1--16.
2. Juan Rodriguez, Paula Manuel and
Paulo Semiao, A conic
associated with the Euler line, 17--23.
3. Charles Thas,
A note on the Droz-Farny
theorem, 25--28.
4. Paris Pamfilos,
The cyclic complex of a cyclic quadrilateral, 29--46.
5. Bernard Gibert,
Isocubics with
concurrent normals, 47--52.
6. Mowaffaq
Hajja and Margarita Spirova,
A characterization of the centroid using June
Lester's shape function, 53--55.
7. Christopher J. Bradley and Geoff
C. Smith, The locations of triangle centers, 57--70.
8. Christopher J. Bradley and Geoff
C. Smith, The locations of the Brocard points, 71--77.
9. Floor van Lamoen,
Archimedean adventures, 79--96.
10. Anne Fontaine and Susan Hurley, Proof by picture: Products and reciprocals of
diagonals length ratios in the regular polygon, 97--101.
11. Hiroshi Okumura and Masayuki
Watanabe, A generalization of Power's Archimedean circles,
103--105.
12. Stanley Rabinowitz, Pseudo-incircles, 107--115.
13. Wilson Stothers,
Grassmann cubics and desmic structures, 117--138.
14. Matthew Hudelson,
Concurrent medians of (2n+1)-gons,
139--147.
15. Dieter Ruoff, On the generating motions and the convexity of a
well-known curve in hyperbolic geometry, 149--166.
16. Mowaffaq
Hajja, A very short and
simple proof of ``the most elementary theorem" of euclidean
geometry, 167--169.
17. Sandor Kiss, The orthic-of-intouch and intouch-of-orthic triangles, 171--177.
18. Kurt Hofstetter, A 4-step construction of the golden ratio, 179--180.
19. Eisso
J. Atzema, A theorem by
Giusto Bellavitis on a class of quadrilaterals, 181--185.
20. Wladimir Boskoff
and Bogdan Suceava, A projectivity characterized
by the Pythagorean relation, 187--190.
21. Bogdan Suceava} and Paul Yiu, The Feuerbach point and
Euler lines, 191--197.
22. Eric Danneels,
A simple perspectivity, 199--203.
23. Quang Tuan Bui, Pedals on circumradii and the Jerabek center, 205--212.
24. Bernard Gibert,
The Simmons conics, 213--224.
25. Nikolaos Dergiades,
A synthetic proof and generalization of Bellavitis' theorem, 225--227.
26. Huub van Kempen,
On some theorems of Poncelet and Carnot, 229--234.
27. Charles Thas,
The Droz-Farny theorem
and related topics, 235--240.
28. Zvonko
Cerin, On butterflies
inscribed in a quadrilateral, 241--246.
29. Eric Danneels,
On triangles with vertices on the angle bisectors,
247--253.
30. Matthew Hudelson,
Formulas among diagonals in the regular polygon
and the Catalan numbers, 255--262.
31. Khoa Lu Nguyen, A note on the barycentric square root of Kiepert perspectors, 263--268.
32. Clark Kimberling, Translated triangle perspective to a reference
triangle, 269--284.
33. James L. Parish, On the derivative of a vertex polynomial, 285--288.
34. Alexei Myakishev,
On two remarkable lines related to a
quadrilateral, 289--295.
35. Max A. Tran Intersecting circles and their inner tangent circle, 297--300.
36. K. R. S. Sastry, Two Brahmagupta problems, 301--310.
37. Floor van Lamoen,
Square wreaths around hexagons, 311--325.
38. Jean-Pierre Ehrmann,
Some geometric constructions, 327--334.
39. Amy Bell, Hansen's right triangle theorem, its converse and a
generalization, 335--342.
40. Paul Yiu,
Some constructions related to the Kiepert hyperbola, 343--357.