Author | Title | Volume:Pages |
Sadi Abu-Saymeh |
Triangle centers with
linear intercepts and linear subangles |
5:33--36 |
Some Brocard-like points
of a triangle |
5:65--74 |
|
Roger C.
Alperin |
A grand
tour of pedals of conics |
4:143--151 |
Nicolae
Anghel |
Minimal
chords in angular regions |
4:111--115 |
Eisso Atzema |
A theorem of Giusto Ballavitis on a class of
quadrilaterals |
6:181--185 |
Jean-Louis Ayme |
Sawayama and Thebault's theorem |
3:225--229 |
A purely synthetic
proof of the Droz-Farny line theorem |
4:219--224 |
|
Amy Bell |
Hansen's right triangle theorem, its converse
and a generalization |
6:335--342 |
Sabrina Bier | Equilateral triangles intercepted by oriented parallelians | 1:25--32 |
Wladimir G. Boskoff | Applications of homogeneous functions
to geometric inequalities and identities in the euclidean plane |
5:143--148 |
A projectivity characterized by the Pythagorean
relation |
6:187--190 |
|
Oene Bottema | The Malfatti problem (with supplement) | 1:43--50;50a |
Gilles Boutte | The Napoleon configuration | 2:39--46 |
Christopher J Bradley |
The locations of triangle centers |
6:57--70 |
The locations of the Brocard points |
6:71--77 |
|
Edward Brisse | Perspective poristic triangles | 1:9--16 |
Quang Tuan Bui |
Pedals on circumradii and the Jerabek center |
6:205--212 |
Zvonko Cerin | Loci related to variable flanks | 2:105--113 |
The
vertex-midpoint-centroid triangle |
4:97--109 |
|
On butterflies inscribed in a quadrilateral |
6:241--246 |
|
Mario Dalcin |
Isotomic inscribed triangles and
their residuals |
3:125--134 |
Eric
Danneels |
A
simple construction of the congruent isoscelizers point |
4:69--71 |
The intouch
triangle and the OI-line |
4:125--134 |
|
A theorem
on orthology center |
4:135--141 |
|
A simple construction
of a triangle from its centroid, incenter, and a vertex |
5:53--56 |
|
The Eppstein centers and the Kenmotu
points |
5:173--180 |
|
A simple perspectivity |
6:199--203 |
|
Triangles with vertices on angle bisectors |
6:247--253 |
|
Bart De Bruyn |
On a problem regarding
the n-sectors of a triangle |
5:47--52 |
Keith Dean | Geometric construction of reciprocal conjugations | 1:115--120 |
Nikolaos Dergiades | The Gergonne problem | 1:75--79 |
A new proof of the isoperimetric inequality | 2:129--130 | |
The perimeter of a cevian triangle | 2:131--134 | |
Harcourt's theorem |
3:117--124 | |
Rectangles attached to the sides of a
triangle |
3:145--159 |
|
Antiparallels and concurrent Euler lines |
4:1--20 | |
Signed
distances and the Erdos-Mordell inequality |
4:67--68 |
|
|
A theorem
on orthology center |
4:135--141 |
|
Garfunkel's
inequality |
4:153--156 |
A synthetic proof and generalization of Bellavitis
theorem |
6:225--227 |
|
Atul
Dixit |
Orthopoles
and the Pappus theorem |
4:53--59 |
Jean-Pierre Ehrmann | A Morley configuration | 1:51--58 |
The Simson cubic | 1:107--114 | |
A pair of Kiepert hyperbolas | 2:1--4 | |
Congruent inscribed rectangles | 2:15--19 | |
The Stammler circles | 2:151--161 | |
Some similarities associated with pedals | 2:163--166 | |
|
Similar pedal and cevian triangles |
3:101--104 |
|
Steiner's
theorems on the complete quadrilateral |
4:35--52 |
|
A projective
generalization of the Droz-Farny line theorem |
4:225--227 |
Some geometric constructions |
6:327--334 |
|
Lev Emelyanov | A note on the Feuerbach point | 1:121--124 |
Euler's formula and Poncelet's theorem | 1:137--140 | |
A Feuerbach type theorem on six circles (with correction) | 1:173--175;176 | |
|
A note on the Schiffler point |
3:113--116 |
On
the intercepts of the OI-line |
4:81--84 |
|
Tatiana Emelyanova | A note on the Feuerbach point | 1:121--124 |
Euler's formula and Poncelet's theorem | 1:137--140 | |
A note on the Schiffler point |
3:113--116 | |
Lawrence Evans | A rapid construction of triangle centers | 2:67--70 |
A conic through six triangle centers | 2:89--92 | |
Some configurations of triangle
centers |
3:49--56 | |
|
A tetrahedral arrangement of triangle centers |
3:181--186 |
Anne Fontaine |
Proof by picture: Products and reciprocals
of diagonals length ratios in the regular polygon |
6:97--101 |
Thierry Gensane |
On the maximal inflation
of two squares |
5:23--31 |
Bernard Gibert | A Morley configuration | 1:51--58 |
The Simson cubic | 1:107--114 | |
The Lemoine cubic and its generalizations | 2:47--63 | |
Orthocorrespondence and
orthopivotal cubics |
3:1--27 |
|
The parasix configuration and orthocorrespondence |
3:169--180 |
|
Antiorthocorrespondents of Circumconics |
3:231--249 |
|
Generalized
Mandart conics |
4:177--198 |
|
Isocubics with concurrent normals |
6:47--52 |
|
The Simmons conics |
6:213--224 |
|
Aad Goddijn |
Triangle - conic porism |
5:57--61 |
Darij Grinberg |
The Apollonius circle
as a Tucker circle |
2:175--182 |
On the Kosnita point and the
reflection triangle |
3:105--111 |
|
Orthopoles
and the Pappus theorem |
4:53--59 |
|
A generalization
of the Kiepert hyperbola |
4:253--260 | |
Mowaffaq Hajja |
Triangle centers with
linear intercepts and linear subangles |
5:33--36 |
Some Brocard-like points
of a triangle |
5:65--74 | |
A characterization of the centroid using
June Lester's shape function |
6:53--55 |
|
A very short and simple proof of the ``most elementary
theorem'' of Euclidean geometry |
6:167--169 |
|
Antreas P. Hatzipolakis | Concurrency of four Euler lines | 1:59--68 |
Pedal triangles and their shadows | 1:81--90 | |
Kurt Hofstetter | A simple construction of the golden section | 2:65--66 |
A 5-step division of a segment in the
golden section |
3:205--206 |
|
Another 5-step division of a segment
in the golden section |
4:21--22 |
|
Divison of a segment in the golden
section with ruler and rusty compass |
5:135--136 |
|
A four-step construction of the golden ratio |
6:179--180 |
|
Matthew Hudelson |
Concurrent medains of (2n+1)-gons |
6:139--147 |
Formulas among diagonals in the regular polygon
and the Catalan numbers |
6:255--262 |
|
Susan Hurley |
Proof by picture: Products and reciprocals
of diagonals length ratios in the regular polygon |
6:97--101 |
Walther Janous |
Further inequalities
of Erdos-Mordell type |
4:203--206 |
Huub van Kempen |
On some theorems of Poncelet and Carnot |
6:229--234 |
Clark Kimberling | Multiplying and dividing curves by points | 1:99--105 |
Conics associated with cevian nests | 1:141--150 | |
Cubics associated with triangles of equal areas | 1:161--171 | |
Collineation, conjugacies, and cubics | 2:21--32 | |
Bicentric pairs of points
and related triangle centers |
3:35--47 |
|
Translated triangles perspective to a reference
triangle |
6:269--284 |
|
Sandor Kiss |
The orthic-of-intouch and intouch-of-orthic triangles |
6:171--177 |
Floor van Lamoen | Friendship among triangle centers | 1:1--6 |
Concurrency of four Euler lines | 1:59--68 | |
Geometric construction of reciprocal conjugations | 1:115--120 | |
The Kiepert pencil of Kiepert hyperbolas | 1:125--132 | |
Pl-perpendicularity | 1:151--160 | |
Some concurrencies from Tucker hexagons | 2:5--13 | |
Equilateral chordal triangles | 2:33--37 | |
The Stammler circles | 2:151--161 | |
Some similarities associated with pedals | 2:163--166 | |
Napoleon triangles and Kiepert
perspectors |
3:65--71 |
|
|
Retangles attached to the sides of a triangle |
3:145--159 |
|
The parasix configuration and orthocorrespondence |
3:169--180 |
|
Circumrhombi |
3:215--223 |
|
Inscribed squares |
4:207--214 |
|
A projective
generalization of the Droz-Farny line theorem |
4:225--227 |
|
Triangle - conic porism |
5:57--61 |
|
Archimedean adventrures |
6::79--96 |
Square wreaths around hexagons |
6:311--325 |
|
Fred Lang | Geometry and group structures on some cubics | 2:135--146 |
Hojoo Lee | Another proof of the Erd"os Mordell theorem | 1:7--8 |
Paula Manuel |
A conic associated with Euler lines |
6:17--23 |
Peter J. C. Moses |
Circles and triangle centers
associated with the Lucas circles |
5:97--106 |
Alexei Myakishev | Some properties of the Lemoine point | 1:91--97 |
On the procircumcenter and
related points |
3:37--42 |
|
On the circumcenters of cevasix
configurations |
3:57--63 |
|
The M-configuration of a triangle |
3:135--144 |
|
A generalization
of the Kiepert hyperbola |
4:253--260 |
|
On two remarkable lines related to a quadrilateral |
6:289--295 |
|
Khoa Lu Nguyen |
A synthetic proof
of Goormaghtigh's generalization of Musselman's theorem |
5:17--20 |
On the complement of the Schiffler
point |
5:149--164 | |
|
On the mixtilinear incircles and excircles |
6:1--16. |
A note on the barycentric square roots of Kiepert
perspectors |
6:263--268 |
|
Minh Ha
Nguyen |
Garfunkel's
inequality |
4:153--156 |
|
Another proof
of Fagnano's inequality |
4:199--201 |
Another proof of van Lamoen's
theorem and its converse |
5:127--132 |
|
Hiroshi
Okumura |
The
Archimedean circles of  Schoch and Woo |
4:27--34 |
The twin circles
of Archimedes in a skewed arbelos |
4:229--251 |
|
|
The arbelos in n-aliquot
parts |
5:37--45 |
|
A generalization of Power's Archimedean circles |
6:103--105 |
Victor Oxman |
On the existence
of triangles with given lengths of one side and
two adjacent angle bisectors |
4:215--218 |
|
On the existence of
triangles with given lengths of one side, the opposite and
one adjacent angle bisectors |
5:21--22 |
|
On the existence of triangles with given circumcircle, incircle, and one additional element | 5:165--171 |
Paris Pamfilos |
On some
actions of D_3 on the triangle |
4:157--176 |
On the cyclic complex of a cyclic quadrilateral |
6:29--46 |
|
James L. Parish |
On the derivative of a vertex polynomial |
6:285--288 |
Cyril Parry | The isogonal tripolar conic | 1:29--34 |
Frank Power |
Some more Archimedean circles
in the arbelos |
5:133--134 |
Stanley Rabinowitz |
Pseudo-incircles |
6:107--115 |
Mirko Radic |
Extreme areas of triangles in Poncelet's
closure theorem |
4:23--26 |
Wilfred Reyes |
An application of Thebault's
theorem |
2:183--185 |
The Lucas circles and the Descartes
formula |
3:95--100 |
|
Juan Rodriguez |
A conic associated with Euler lines |
6:17--23 |
Dieter Ruoff |
On the generating motions and the convexity
of a well-known curve in hyperbolic geometry |
6:149--166 |
Philippe Ryckelynck |
On the maximal inflation
of two squares |
5:23--31 |
Juan Carlos Salazar |
Harcourt's theorem |
3:117--124 |
On
the areas of the intouch and extouch triangles |
4:61--65 |
|
On the mixtilinear incircles and excircles |
6:1--16 |
|
Joszef Sandor |
On the geometry of equilateral
triangles |
5:107--117 |
K.R.S. Sastry | Heron triangles: a Gergonne-cevian-and-median perspective | 1:17--24 |
Brahmagupta quadrilaterals |
2:167--173 | |
Triangles
with special isotomic conjugate pairs |
4:73--80 | |
Construction of Brahmagupta n-gons |
5:119--126 |
|
A Gergonne analogue of the Steiner-Lehmus
theorem |
5:191--195 |
|
Two Brahmagupta problems |
6:301--310 |
|
Paulo Semiao |
A conic associated with Euler lines |
6:17--23 |
Eckart Schmidt | Circumcenters of residual triangles | 3:207--213 |
Benedetto Scimemi |
Paper folding and Euler's theorem revisited |
2:93--104 |
Bruce Shawyer | Some remarkable concurrences | 1:69--74 |
Steve Sigur |
Where are the conjugates? |
5:1--15 |
Geoff C. Smith |
Statics and moduli space of triangles |
5:181--190 |
The locations of triangle centers |
6:57--70 |
|
The locations of the Brocard points |
6:71--77 |
|
Margarita Spirova |
A characterization of the centroid using
June Lester's shape function |
6:53--55 |
Milorad Stevanovic |
Triangle centers associated
with the Malfatti circles |
3:83--93 |
The Apollonius circle and related
triangle centers |
3:187--195 |
|
Two triangle centers associated
with the excircles |
3:197--203 |
|
Wilson Stothers |
Grassmann cubics and desmic structures |
6:117--138 |
Bogdan Suceava |
Applications of  homogeneous
functions to geometric inequalities and identities in the euclidean plane
|
5:143--148 |
A projectivity characterized by the Pythagorean
relation |
6:187--190 |
|
The Feuerbach point and Euler lines |
6:191--197 |
|
Charles Thas | On some remarkable concurrences | 2:147--149 |
A generalization of the Lemoine point |
3:161--167 |
|
On the
Schiffler point |
4:85--95 |
|
A note on the Droz-Farny theorem |
6:25--28 |
|
The Droz-Farny theorem and related topics |
6:235--240 |
|
Li C.
Tien |
Three
pairs of congruent circles in a circle |
4:117--123 |
Ricardo M. Torrejon |
On an Erdos inscribed
triangle inequality |
5:137--141 |
Max A. Tran |
Intersecting circles and their inner tangent
circle |
6:297--300 |
Antreas Varverakis |
A maximal property of cyclic
quadrilaterals |
5:63--64 |
Masayuki
Watanabe |
The
Archimedean circles of Schoch and Woo |
4:27--34 |
The twin circles
of Archimedes in a skewed arbelos |
4:229--251 |
|
The arbelos in n-aliquot
parts |
5:37--45 |
|
A generalization of Power's Archimedean circles | 6:103--105 |
|
Barry Wolk | Concurrency of four Euler lines | 1:59--68 |
Peter Woo | Simple constructions of the incircle of an arbelos | 1:133--136 |
On the circumcenters of cevasix
configurations |
3:57--63 |
|
Peter Yff | A generalization of the Tucker circles | 2:71--87 |
Paul Yiu | Concurrency of four Euler lines | 1:59--68 |
Pedal triangles and their shadows | 1:81--90 | |
The Kiepert pencil of Kiepert hyperbolas | 1:125--132 | |
The Apollonius circle
as a Tucker circle |
2:175--182 |
|
|
On the Fermat lines |
3:73--81 |
Antiparallels and concurrent Euler lines |
4:1--20 |
|
Elegant geometric constructions |
5:75--96 |
|
The Feuerbach point and Euler lines | 6:191--197 |
|
Some constructions related to the Kiepert hyperbola |
6:343--357 |
|
Barukh Ziv | Napoleon-like configurations and sequences of triangles | 2:115--128 |
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Last modified by Paul Yiu, January 3, 2007.