Tạp chí Hình học Geometricorum

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Another simple construction of the golden section - Michel Bataille

LTTK CTV, 9/10/19

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Đọc:

239

LTTK CTV

9/10/19
A simple construction of the golden section - Jo Niemeyer

LTTK CTV, 9/10/19

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Đọc:

231

LTTK CTV

9/10/19
Triangles with given incircle and centroid - Paris Pamfilos

LTTK CTV, 9/10/19

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0

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241

LTTK CTV

9/10/19
Translation of Fuhrmann's Sur un nouveau cercle associe a un triangle - Jan Vonk and J. Chris Fisher

LTTK CTV, 9/10/19

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0

Đọc:

240

LTTK CTV

9/10/19
The incenter and an excenter as solutions to an extremal problem - Arie Bialostocki and Dora Bialostocki

LTTK CTV, 9/10/19

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0

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232

LTTK CTV

9/10/19
The circles of Lester, Evans, Parry, and their generalizations - Paul Yiu

LTTK CTV, 9/10/19

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0

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218

LTTK CTV

9/10/19
Characterizations of bicentric quadrilaterals - Martin Josefsson

LTTK CTV, 9/10/19

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Đọc:

306

LTTK CTV

9/10/19
On the Euler reflection point - Cosmin Pohoata

LTTK CTV, 9/10/19

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Đọc:

350

LTTK CTV

9/10/19
Integer triangles with R/r = N - Allan MacLeod

LTTK CTV, 9/10/19

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Đọc:

860

LTTK CTV

9/10/19
Construction with inscribed ellipses in a triangle - Nikolaos Dergiades

LTTK CTV, 9/10/19

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0

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220

LTTK CTV

9/10/19
Trilinear distance inequalities for the symmedian point, the centroid, and other triangle centers - Clark Kimberling

LTTK CTV, 9/10/19

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0

Đọc:

275

LTTK CTV

9/10/19
Generalized Fibonacci circle chains - Giovanni Lucca

LTTK CTV, 9/10/19

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0

Đọc:

285

LTTK CTV

9/10/19
Calculations concerning the tangent lengths and tangency chords of a tangential quadrilateral - Martin Josefsson

LTTK CTV, 9/10/19

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0

Đọc:

299

LTTK CTV

9/10/19
Iterates of Brocardian points and lines - Gotthard Weise

LTTK CTV, 9/10/19

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243

LTTK CTV

9/10/19
Three maximal cyclic quadrangles - Paris Pamfilos

LTTK CTV, 9/10/19

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243

LTTK CTV

9/10/19
Diophantine Steiner triples and Pythagorean-type triangles - Bojan Hvala

LTTK CTV, 9/10/19

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0

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258

LTTK CTV

9/10/19
Orthic quadrilaterals of a convex quadrilateral - Maria Flavia Mammana, Biagio Micale and Mario Pennisi

LTTK CTV, 9/10/19

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221

LTTK CTV

9/10/19
Simple relations regarding the Steiner inellipse of a triangle - Benedetto Scimemi

LTTK CTV, 9/10/19

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234

LTTK CTV

9/10/19
Conics tangent at the vertices to two sides of a triangle - Nikolaos Dergiades

LTTK CTV, 9/10/19

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229

LTTK CTV

9/10/19
Some triangle centers associated with the circles tangent to the excircles - Boris Odehnal

LTTK CTV, 9/10/19

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222

LTTK CTV

9/10/19
On the inradius of a tangential quadrilateral - Martin Josefsson

LTTK CTV, 9/10/19

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235

LTTK CTV

9/10/19
A maximal parallelogram characterization of ovals having circles as orthoptic curves - Nicolae Anghel

LTTK CTV, 9/10/19

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221

LTTK CTV

9/10/19
The Poncelet pencil of rectangular hyperbolas - Roger C. Alperin

LTTK CTV, 9/10/19

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0

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230

LTTK CTV

9/10/19
A new proof of a hard but important Sangaku problem - J. Marshall Unger

LTTK CTV, 9/10/19

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0

Đọc:

279

LTTK CTV

9/10/19
A triad of similar triangles associated with the perpendicular bisectors of the sides of a triangle - Quang Tuan Bui

LTTK CTV, 9/10/19

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0

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269

LTTK CTV

9/10/19
Reflections in triangle geometry - Antreas P. Hatzipolakis and Paul Yiu

LTTK CTV, 9/10/19

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337

LTTK CTV

9/10/19
Trilinear polars of Brocardians - Francisco Javier Garcia Capitan

LTTK CTV, 9/10/19

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0

Đọc:

240

LTTK CTV

9/10/19
A sequence of triangles and geometric inequalities - Dan Marinescu, Mihai Monea, Mihai Opincariu and Marian Stroe

LTTK CTV, 9/10/19

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279

LTTK CTV

9/10/19
Pythagorean triangles with square of perimeter equal to an integer multiple of area - John F. Goehl

LTTK CTV, 9/10/19

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0

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235

LTTK CTV

9/10/19
On the construction of a triangle from the feet of its angle bisectors - Alexey V. Ustinov

LTTK CTV, 9/10/19

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220

LTTK CTV

9/10/19
On the possibility of trigonometric proofs of the Pythagorean theorem - Jason Zimba

LTTK CTV, 9/10/19

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221

LTTK CTV

9/10/19
Ten concurrent Euler lines - Nikolai Ivanov Beluhov

LTTK CTV, 9/10/19

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0

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226

LTTK CTV

9/10/19
Some triangle centers associated with the tritangent circles - Nikolas Dergiades and Juan Carlos Salazar

LTTK CTV, 9/10/19

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0

Đọc:

221

LTTK CTV

9/10/19
Conic homographies and bitangent pencils - Paris Pamfilos

LTTK CTV, 9/10/19

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0

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246

LTTK CTV

9/10/19
A simple barycentric coordinates formula - Nikolaos Dergiades

LTTK CTV, 9/10/19

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0

Đọc:

263

LTTK CTV

9/10/19
On the construction of regular polygons and generalized Napoleon vertices - Dimitris Vartziotis and Joachim Wipper

LTTK CTV, 9/10/19

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0

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266

LTTK CTV

9/10/19
Class preserving dissections of convex quadrilaterals - Dan Ismailescu and Adam Vojdany

LTTK CTV, 9/10/19

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233

LTTK CTV

9/10/19
On three circles - David Graham Searby

LTTK CTV, 9/10/19

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227

LTTK CTV

9/10/19
Circle chains inside a circular segment - Giovanni Lucca

LTTK CTV, 9/10/19

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240

LTTK CTV

9/10/19
A family of quartics associated with a triangle - Peter Yff

LTTK CTV, 9/10/19

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0

Đọc:

240

LTTK CTV

9/10/19
An angle bisector parallel applied to triangle construction - Harold Connelly and Beata Randrianantoanina

LTTK CTV, 9/10/19

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0

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237

LTTK CTV

9/10/19
On trigonometric proofs of the Steiner-Lehmus theorem - Robert Olah-Gal and Jozsef Sandor

LTTK CTV, 9/10/19

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0

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226

LTTK CTV

9/10/19
The symmedian point and concurrent antiparallel images - Shao-Cheng Liu

LTTK CTV, 9/10/19

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0

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430

LTTK CTV

9/10/19
Heptagonal triangles and their companions - Paul Yiu

LTTK CTV, 7/10/19

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0

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264

LTTK CTV

7/10/19
A note on the anticomplements of the Fermat points - Cosmin Pohoata

LTTK CTV, 7/10/19

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0

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271

LTTK CTV

7/10/19
Characterizations of a tangential quadrilateral - Nicusor Minculete

LTTK CTV, 7/10/19

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0

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300

LTTK CTV

7/10/19
An extension of triangle constructions from located points - Harold Connelly

LTTK CTV, 7/10/19

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0

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252

LTTK CTV

7/10/19
Folding a square to identify two adjacent sides - Cristinel Mortici

LTTK CTV, 7/10/19

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0

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230

LTTK CTV

7/10/19
On the Newton line of a quadrilateral - Paris Pamfilos

LTTK CTV, 7/10/19

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0

Đọc:

243

LTTK CTV

7/10/19
Rings of squares around orthologic triangles - Zvonko Cerin

LTTK CTV, 7/10/19

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0

Đọc:

212

LTTK CTV

7/10/19
The Feuerbach point and reflections of the Euler line - Jan Vonk

LTTK CTV, 7/10/19

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0

Đọc:

316

LTTK CTV

7/10/19
On integer relations between the area and perimeter of Heron triangles - Allan J. MacLeod

LTTK CTV, 7/10/19

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0

Đọc:

237

LTTK CTV

7/10/19
Mappings associated with vertex triangles - Clark Kimberling

LTTK CTV, 7/10/19

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0

Đọc:

230

LTTK CTV

7/10/19
The lost daughters of Gergonne - Steve Butler

LTTK CTV, 7/10/19

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0

Đọc:

245

LTTK CTV

7/10/19
On n-sections and reciprocal quadrilaterals - Eisso J. Atzema

LTTK CTV, 7/10/19

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0

Đọc:

217

LTTK CTV

7/10/19
A generalization of Thebault's theorem on the concurrency of three Euler lines - Shao-Cheng Liu

LTTK CTV, 7/10/19

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0

Đọc:

290

LTTK CTV

7/10/19
An elementary proof of a theorem by Emelyanov - Eisso J. Atzema

LTTK CTV, 7/10/19

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0

Đọc:

262

LTTK CTV

7/10/19
A purely geometric proof of the uniqueness of a triangle with prescribed angle bisectors - Victor Oxman

LTTK CTV, 7/10/19

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0

Đọc:

227

LTTK CTV

7/10/19
On the Nagel line and a prolific polar triangle - Jan Vonk

LTTK CTV, 7/10/19

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0

Đọc:

235

LTTK CTV

7/10/19
Second-degree involutory symbolic substitutions - Clark Kimberling

LTTK CTV, 7/10/19

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0

Đọc:

266

LTTK CTV

7/10/19
Some identities arising from inversion of Pappus chains in an arbelos - Giovanni Lucca

LTTK CTV, 7/10/19

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0

Đọc:

222

LTTK CTV

7/10/19
Another compass-only construction of the golden section and of the regular pentagon - Michel Bataille

LTTK CTV, 7/10/19

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0

Đọc:

251

LTTK CTV

7/10/19
A new proof of a weighted Erdos-Mordell type inequality - Yu-Dong Wu

LTTK CTV, 7/10/19

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0

Đọc:

260

LTTK CTV

7/10/19
Stronger forms of the Steiner-Lehmus theorem - Mowaffaq Hajja

LTTK CTV, 7/10/19

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0

Đọc:

249

LTTK CTV

7/10/19
On the generalized Gergonne point and beyond - Miklos Hoffmann and Sonja Gorjanc

LTTK CTV, 7/10/19

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0

Đọc:

279

LTTK CTV

7/10/19
Two more Powerian pairs in the arbelos - Quang Tuan Bui

LTTK CTV, 7/10/19

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0

Đọc:

229

LTTK CTV

7/10/19
Another variation of the Steiner-Lehmus theme - Sadi Abu-Saymeh, Mowaffaq Hajja, and Hassan Ali ShahAli

LTTK CTV, 7/10/19

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0

Đọc:

227

LTTK CTV

7/10/19
On the centroids of polygons and polyhedra - Maria Flavia Mammana, Biagio Micale and Mario Pennisi

LTTK CTV, 7/10/19

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0

Đọc:

220

LTTK CTV

7/10/19
Periodic billiard trajectories in polyhedra - Nicolas Bedaride

LTTK CTV, 6/10/19

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0

Đọc:

233

LTTK CTV

6/10/19
A condition for a circumscriptible quadrilateral to be cyclic - Mowaffaq Hajja

LTTK CTV, 6/10/19

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0

Đọc:

230

LTTK CTV

6/10/19
Means as chords - Francisco Javier Garcia Capitan

LTTK CTV, 6/10/19

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0

Đọc:

240

LTTK CTV

6/10/19
A short proof of Lemoine's theorem - Cosmin Pohoata

LTTK CTV, 6/10/19

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0

Đọc:

265

LTTK CTV

6/10/19
Cubics related to coaxial circles - Bernard Gibert

LTTK CTV, 6/10/19

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0

Đọc:

311

LTTK CTV

6/10/19
An inequality involving the angle bisectors and an interior point of a triangle - Wei-Dong Jiang

LTTK CTV, 6/10/19

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0

Đọc:

229

LTTK CTV

6/10/19
Haruki's lemma and a related locus problem - Yaroslav Bezverkhnyev

LTTK CTV, 6/10/19

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0

Đọc:

350

LTTK CTV

6/10/19
A simple ruler and rusty compass construction of the regular pentagon - Kurt Hofstetter

LTTK CTV, 6/10/19

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0

Đọc:

221

LTTK CTV

6/10/19
Construction of Malfatti squares - Floor van Lamoen and Paul Yiu

LTTK CTV, 6/10/19

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0

Đọc:

268

LTTK CTV

6/10/19
On the Parry reflection point - Cosmin Pohoata

LTTK CTV, 6/10/19

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0

Đọc:

228

LTTK CTV

6/10/19
A short trigonometric proof of the Steiner-Lehmus theorem - Mowaffaq Hajja

LTTK CTV, 6/10/19

Trả lời:

0

Đọc:

225

LTTK CTV

6/10/19
Kronecker theorem and a sequence of triangles - Panagiotis T. Krasopoulos

LTTK CTV, 6/10/19

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0

Đọc:

222

LTTK CTV

6/10/19
Angles, area and perimeter caught in a cubic - George Baloglou and Michel Helfgott

LTTK CTV, 6/10/19

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0

Đọc:

219

LTTK CTV

6/10/19
Two triads of congruent circles from reflections - Quang Tuan Bui

LTTK CTV, 6/10/19

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0

Đọc:

301

LTTK CTV

6/10/19
An affine variant of a Steinhaus problem - Jean-Pierre Ehrmann

LTTK CTV, 6/10/19

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0

Đọc:

234

LTTK CTV

6/10/19
On a construction of Hagge - Christopher Bradley and Geoff Smith

LTTK CTV, 6/10/19

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0

Đọc:

254

LTTK CTV

6/10/19
How pivotal isocubics intersect the circumcircle - Bernard Gibert

LTTK CTV, 6/10/19

Trả lời:

0

Đọc:

231

LTTK CTV

6/10/19
Another verification of Fagnano's theorem - Finbarr Holland

LTTK CTV, 6/10/19

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0

Đọc:

295

LTTK CTV

6/10/19
Cyclic quadrilaterals with prescribed Varignon parallelogram - Michel Bataille

LTTK CTV, 6/10/19

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0

Đọc:

228

LTTK CTV

6/10/19
The Soddy circles - Nikolaus Dergiades

LTTK CTV, 6/10/19

Trả lời:

0

Đọc:

338

LTTK CTV

6/10/19
Constructive solution of a generalization of Steinhaus' problem on partition of a triangle - Jean-Pierre Ehrmann

LTTK CTV, 6/10/19

Trả lời:

0

Đọc:

253

LTTK CTV

6/10/19
Steinhaus' problem on partition of a triangle - Apoloniusz Tyszka

LTTK CTV, 6/10/19

Trả lời:

0

Đọc:

387

LTTK CTV

6/10/19
On a product of two points induced by their cevian triangles - Cosmin Pohoata and Paul Yiu

LTTK CTV, 6/10/19

Trả lời:

0

Đọc:

215

LTTK CTV

6/10/19
Fixed points and fixed lines of Ceva collineations - Clark Kimberling

LTTK CTV, 6/10/19

Trả lời:

0

Đọc:

225

LTTK CTV

6/10/19
Some triangle centers associated with the excircles - Tibor Dosa

LTTK CTV, 6/10/19

Trả lời:

0

Đọc:

244

LTTK CTV

6/10/19
On the diagonals of a cyclic quadrilateral - Claudi Alsina and Roger B. Nelsen

LTTK CTV, 6/10/19

Trả lời:

0

Đọc:

235

LTTK CTV

6/10/19
Coincidence of centers for scalene triangles - Sadi Abu-Saymeh and Mowaffaq Hajja

LTTK CTV, 6/10/19

Trả lời:

0

Đọc:

233

LTTK CTV

6/10/19
Heronian triangles whose areas are integer multiples of their perimeters - Lubomir Markov

LTTK CTV, 6/10/19

Trả lời:

0

Đọc:

218

LTTK CTV

6/10/19
Remarks on Woo's Archimedean circles - Hiroshi Okumura and Masayuki Watanabe

LTTK CTV, 6/10/19

Trả lời:

0

Đọc:

251

LTTK CTV

6/10/19
Characterizations of an infinite set of Archimedean circles - Hiroshi Okumura and Masayuki Watanabe

LTTK CTV, 6/10/19

Trả lời:

0

Đọc:

246

LTTK CTV

6/10/19
The arbelos and nine-point circles - Quang Tuan Bui

LTTK CTV, 5/10/19

Trả lời:

0

Đọc:

242

LTTK CTV

5/10/19
Some more Powerian pairs in the arbelos - Floor van Lamoen

LTTK CTV, 5/10/19

Trả lời:

0

Đọc:

236

LTTK CTV

5/10/19

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