Photo by Masayo Aye |
Photo by Masayo Aye |

## Hypercube On Point (2019)Iva Kodrnja & Helena Koncul In this portrayal of a tesseract, the inner cube is replaced by its Platonic dual – an octahedron. Edges of its base square are connected to skew edges of the outer cube by strings which, looking at each pair of connected edges, geometrically define one system of rulings of a hyperbolic paraboloid. The inspiration for this piece are old string models, used and created for scientific and educational purposes of studying ruled surfaces in the 19th century. Models of this kind can be found in the majority of technical universities throughout the world, and today, with the help of modern technologies such as CNC machines and CAD software, digital production of similar models can be and still is an excellent educational tool. ## Materials:Laser-cut cardboard, wooden tile, glue, spray paint and knitting yarn ## Dimensions:60x56x56 cm |

We would like to thank our friends Milena Stavrić and Albert Wiltsche at Institute for Architecture and Media, TU Graz and Željko Kelković at Department of Engineering Mechanics at Faculty of Civil Engineering in Zagreb for their help with the realization of this project. ## Octahedron & 8 Parabolae (2019)Iva Kodrnja & Helena Koncul Dual to the Steiner construction of conics, by taking two intersecting lines we can construct a number of tangents of a parabola, called a dual parabola. This simple construction is knitted inside 8 faces of an octahedron. The octahedron has the ideal amount of complexity and an extraordinary structure consisting of two pyramids. ## Materials:Laser-cut MDF board, wooden tile, glue, spray paint and knitting yarn ## Dimensions:25x22x22 cm |

We would like to thank Željko Kelković at Department of Engineering Mechanics at Faculty of Civil Engineering for helping us with realization of this project. |