International Journal of Geometry

2021

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

DORIN ANDRICA and GEORGE C. ŢURCAŞ – The converse of the Newton-Gauss theorem

DORIN ANDRICA and GEORGE C. ŢURCAŞ – The converse of the Newton-Gauss theorem

MICHAEL N. FRIED – From any two directly similar figures, produce a new one

MICHAEL N. FRIED – From any two directly similar figures, produce a new one

NENAD STOJANOVIC – Tiling a plane with two types of semi-regular equilateral polygons

NENAD STOJANOVIC – Tiling a plane with two types of semi-regular equilateral polygons

LILIANA GABRIELA GHEORGHE – When Euler (circle) meets Poncelet (porism)

LILIANA GABRIELA GHEORGHE – When Euler (circle) meets Poncelet (porism)

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