International Journal of Geometry

2021

MARTIN JOSEFSSON and MARIO DALCÍN – More new characterizations of tangential quadrilaterals

MARTIN JOSEFSSON and MARIO DALCÍN – More new characterizations of tangential quadrilaterals

DAN REZNIK and RONALDO GARCIA – Circuminvariants of 3-periodics in the Elliptic Billiard

DAN REZNIK and RONALDO GARCIA – Circuminvariants of 3-periodics in the Elliptic Billiard

KAORU MOTOSE – On the distance between the incenter and the circumcenter of a triangle

KAORU MOTOSE – On the distance between the incenter and the circumcenter of a triangle

MAMUKA MESKHISHVILI – Cyclic averages of regular polygonal distances

MAMUKA MESKHISHVILI – Cyclic averages of regular polygonal distances

RONALDO GARCIA and DAN REZNIK – Related by similarity I: Poristic triangles and 3-periodics in the elliptic billiard

RONALDO GARCIA and DAN REZNIK – Related by similarity I: Poristic triangles and 3-periodics in the elliptic billiard

DIXON J. JONES – Modest triangles and periambic points

DIXON J. JONES – Modest triangles and periambic points

FRANCISCO JAVIER GARCÍA CAPITÁN – A structure on the circumcircle

FRANCISCO JAVIER GARCÍA CAPITÁN – A structure on the circumcircle

TRAN QUANG HUNG and NGUYEN THI THUY DUONG – A generalization of Feuerbach’s theorem

TRAN QUANG HUNG and NGUYEN THI THUY DUONG – A generalization of Feuerbach’s theorem

ANASTASIOS N. ZACHOS – A generalization of Pythagoras on a surface in the sense of Toponogov

ANASTASIOS N. ZACHOS – A generalization of Pythagoras on a surface in the sense of Toponogov

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