International Journal of Geometry

Vol. 10 (2021), No. 3, July

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 the circumcenter of a triangle
RONALDO GARCIA and DAN REZNIK – Related by similarity I: Poristic triangles and 3-periodics in the elliptic billiard
FRANCISCO JAVIER GARCÍA CAPITÁN – A structure on the circumcircle
ANASTASIOS N. ZACHOS – A generalization of Pythagoras on a surface in the sense of Toponogov
MICHAEL N. FRIED – From any two directly similar figures, produce a new one