Forum Geometricorum
Volume 9
(2009)
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- Eisso J. Atzema, On
n-sections and reciprocal quadrilaterals, 1--17.
- Steve Butler, The lost daughters of
Gergonne, 19--26.
- Clark
Kimberling, Mappings associated with vertex triangles, 27--39.
- Allan
E. MacLeod, On integer relations between the area and perimeter
of Heron triangles, 41--46.
- Jan Vonk, The Feuerbach point and reflections
of the Euler line, 47--55.
- Zvonko
Cerin, Rings of squares around orthologic triangles, 57--80.
- Paris
Pamfilos, On the Newton line of a quadrilateral, 81--98.
- Cristinel
Mortici, Folding a square to identify two adjacent sides, 99--107.
- Harold
Connelly, An extension of triangle constructions from located
points, 109--112.
- Nicusor
Minculete, Characterizations of tangential quadrilaterals, 113--118.
- Cosmin
Pohoata, A note on the anticomplements of the Fermat points, 119--123.
- Paul
Yiu, Heptagonal triangles and their companions, 125--148.
- Shao-Cheng
Liu, The symmedian point and concurrent antiparallel images, 149--154.
- Robert
Olah-Gal and Jozsef Sandor, On trigonometric proofs of the Steiner-Lehmus
theorem, 155--160.
- Harold
Connelly and Beata Randrianantoanina, An angle bisector parallel
applied to triangle construction, 161--163.
- Peter
Yff, A family of quartics associated with a triangle, 165--171.
- Giovanni
Lucca, Circle chains inside a circular segment, 173--179.
- David Graham
Searby, On three circles, 181--193.
- Dan Ismailescu
and Adam Vojdany, Class preserving dissections of convex quadrilaterals,
195--211.
- Dimitris Vartziotis
and Joachim Wipper, On the construction of regular polygons and generalized
Napoleon vertices, 213--223.
- Nikolaos Dergiades,
A simple barycentric coordinates formula, 225--228.
- Paris Pamfilos,
Conic homographies and bitangent pencils, 229--257.
- Nikolas Dergiades
and Juan Carlos Salazar, Some triangle centers associated with the tritangent
circles, 259--270.
- Nikolai Ivanov
Beluhov, Ten concurrent Euler lines, 217--274.
- Jason Zimba, On
the possibility of trigonometric proofs of the Pythagorean theorem, 275--278.
- Alexey V. Ustinov,
On the construction of a triangle from the feet of its angle bisectors,
279--280.
- John F. Goehl, Jr.,
Pythagorean triangles with square of perimeter equal to an integer multiple
of area, 281--282.
- Shao-Cheng Liu, Trilinear
polars and antiparallels, 283--290.
- Dan Marinescu, Mihai
Monea, Mihai Opincariu, and Marian Stroe, A sequence of triangles
and geometric inequalities, 291--295.
- Francisco Javier Garcia
Capitan, Trilinear polars of Brocardians, 297--300.
- Antreas P Hatzipolakis and
Paul Yiu, Reflections in triangle geometry, 301--348.