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Journal for Geometry and Graphics 20 (2016), No. 2, 173--184
Copyright Heldermann Verlag 2016



Normal Forms of Triangles and Quadrangles up to Similarity

Peteris Daugulis
Institute of Life Sciences and Technologies, Daugavpils University, Parades 1, 5400 Daugavpils, Latvia
peteris.daugulis@du.lv

Vija Vagale
Institute of Life Sciences and Technologies, Daugavpils University, Parades 1, 5400 Daugavpils, Latvia



The problem of introducing new normal forms of mathematical objects is considered in the case of Euclidean geometry. Normal forms of plane geometry objects such as triangles up to similarity are considered. Several normal forms for triangles and a normal form for quadrangles of special case are described. Normal forms of simple plane objects such as triangles can be used in mathematics education, computations and research.

Keywords: Normal forms, similarity, triangle, quadrangle.

MSC: 51M04; 97G50, 97D99

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