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Moravcová, Vlasta; Robová, Jarmila; Hromadová, Jana; Halas, Zdenek – Journal on Efficiency and Responsibility in Education and Science, 2021
The paper focuses on students' understanding of the concepts of axial and central symmetries in a plane. Attention is paid to whether students of various ages identify a non-model of an axially symmetrical figure, know that a line segment has two axes of symmetry and a circle has an infinite number of symmetry axes, and are able to construct an…
Descriptors: Geometric Concepts, Plane Geometry, Foreign Countries, Cognitive Processes