LILIANA GABRIELA GHEORGHE – When Newton’s conic meets Apollonius’ problem PARIS PAMFILOS – The conic of intersections of an affinity TRAN QUANG HUNG – A generalization of the Simson line using two isogonal conjugate points MARTIN JOSEFSSON and MARIO DALCÍN – New characterizations of extangential quadrilaterals G. T. VICKERS – Tangents to a Cubic Curve […]
LILIANA GABRIELA GHEORGHE – When Euler (circle) meets Poncelet (porism) DAN REZNIK and RONALDO GARCIA – Related by Similarity II: Poncelet 3 – periodics in the homothetic pair and the Brocard porism MARTIN JOSEFSSON and MARIO DALCÍN – 100 characterizations of tangential quadrilaterals DEBRA MIMBS GLADDEN, WILLIAM FULFORD, SAMUEL D. GRUBER and ALEXANDRA SQUIRES – […]
D. PELLEGRINETTI and M. DE VILLIERS – Forgotten properties of the Van Aubel and bride’s chair configurations ESMA D. ÇETIN and YUSUF YAYLI – Homothetic motions and surfaces with H2-K=0 in Lorentz 3-Space MARTIN JOSEFSSON and MARIO DALCÍN – More new characterizations of tangential quadrilaterals KAORU MOTOSE – On the distance between the incenter and […]
AHMED MOHSIN MAHDI – Conics on the sphere NORBERT HUNGERBÜHLER and CLEMENS POHLE – Communicating harmonic pencils of lines LILIANA GABRIELA GHEORGHE – Apollonius problem: in pursuit of a natural solution MARTIN JOSEFSSON and MARIO DALCÍN – New characterizations of tangential quadrilaterals JORGE C. LUCERO – Folding axioms for a 3D extension of origami JIAN […]
DARIO PELLEGRINETTI – The six – point circle for the quadrangle MARTIN JOSEFSSON – More characterizations of cyclic quadrilaterals ÖZCAN GELIŞGEN and SERHAT YAVUZ – A note about isometry groups of chamfered dodecahedron and chamfered icosahedron spaces TRAN QUANG HUNG – A direct trigonometric proof of Morley’s theorem DAO THANH OAI and CHERNG-TIAO PERNG – […]
MARTIN JOSEFSSON – Characterizations of cyclic quadrilaterals GIOVANNI LUCCA – Integer sequences, Pythagorean triplets and circle chains inscribed inside a parabola PARIS PAMFILOS – Second note on Jerabek’s hyperbola YURII N. MALTSEV and ANNA S. MONASTYREVA – On some relation for a triangle SIMON DAVIS – Hyperelliptic curves and arithmetic functions MURAT BABAARSLAN and YUSUF […]
DAVID FRAIVERT – New applications of method of complex numbers in the geometry of cyclic quadrilaterals HIROSHI OKUMURA – Wasan geometry with the division by 0 PARIS PAMFILOS – Circles associated to pairs of conjugate diameters FEYZA E. ERDOĞAN, SELCEN Y. PERKTAŞ and RIFAT GÜNEŞ – Half-lightlike submanifolds with degenerate and non-degenerate planar normal sections […]
ӦZCAN GELIṢGEN, TEMEL ERMIṢ and IBRAHIM GÜNALTILI – A note about the metrics induced by truncated dodecahedron and truncated icosahedron MARIUS DRĂGAN and NECULAI STANCIU – An irrational refinement of Yun’s inequality in bicentric quadrilateral MARTIN JOSEFSSON – Characterizations of exbicentric quadrilaterals ONUR KAYA and MEHMET ÖNDER – New partner curves in the Euclidean 3 […]
DAO THANH OAI and LEONARD MIHAI GIUGIUC – The new inequality in a cyclic polygon MARTIN JOSEFSSON – Metric relations in extangential quadrilaterals MARIAN CUCOANEȘ – A new proof to the theorem of Coșniţă ANTONIO GUTIERREZ, HIROSHI OKUMURA and HUSSEIN TAHIR – Poristic triangles of the arbelos JAMES PARKS – Regular n – gons in […]
OVIDIU T. POP, SÁNDOR N. KISS and NICUŞOR MINCULETE – Cyclic quadrilaterals corresponding to a given Varignon parallelogram IGOR MINEVICH and PATRICK MORTON – Synthetic foundations of cevian geometry, II: The center of the cevian conic RAM SHANKAR GUPTA – Biharmonic hypersurfaces in E^6 with constant scalar curvature SELAHATTIN ASLAN and YUSUF YAYLI – Split […]