Helena Halas

Applications of the sine and cosine rules for a quadrilateral

An artistic approach to the tesseract

Playing with the Constructions of Limacon

Line-inversion and pedal transformation in the quasi-hyperbolic plane

Nedian triangle of ratio n

Circular curves of the 3rd class obtained by projective mapping in QH_2(R)

The Loci of Vertices of Nedian Triangles

Introduction to the Planimetry of the Quasi-Elliptic Plane

Circular curves of the 3rd class in the quasi- hyperbolic plane obtained by projective mapping

3rd Class Circular Curves in Quasi-Hyperbolic Plane Obtained by Projective Mapping

Klasifikacija cirkularnih krivulja 3. razreda u kvazihiperboličkoj ravnini

Circular curves of the 3rd class in the quasi-hyperbolic plane

Circular curves of the 3rd class obtained by pedal transformation in the quasi-hyperbolic plane

Pedal Curves and their Envelopes

Line Inversion in the Quasi-Hyperbolic Plane

Curves of the 3rd class obtained by line-inversion in the quasi-hyperbolic plane

Introducing 3D Modeling into Geometry Education at Two Technical Faculties at the University of Zagreb

Family of triangles and related curves

From the geometry of quasi-hyperbolic plane

Introduction to the Planimetry of the Quasi- Hyperbolic Plane

Triangle family and Euler

Introducing 3D modeling in teaching of geometry at technical faculties at University of Zagreb

Isotomic transformation in the Pseudoeuclidean plane

Some triangle geometry of the triangle family

Izotomične točke trokuta

Conics and Osculating Circles in Hyperbolic Plane

Isogonal and isotomic conjugates of a triangle

O nekim značajnim točkama trokuta