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CME12, 2012.07.02. – Rzeszów, Poland Gergely Wintsche Generalization through problem solving Gergely Wintsche Mathematics Teaching and Didactic Center Faculty of Science Eötvös Loránd University, Budapest

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Gergely Wintsche Outline 1. Introduction – around the word 2. Coloring the cube The frames of the cube The case of two colors The case of six colors The case of the rest 3. Coloring the tetrahedron 4. Coloring the octahedron 5. The common points 6. The football Part I / 2 – Coloring and folding regular solids

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Gergely WintschePart I / 3 – Coloring and folding regular solids, Introduction – Around the word The question

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Gergely WintschePart I / 4 – Coloring and folding regular solids, Introduction – Around the word The answers –first student

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Gergely WintschePart I / 5 – Coloring and folding regular solids, Introduction – Around the word The answers –second student

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Gergely WintschePart I / 6 – Coloring and folding regular solids, Introduction – Around the word The answers –third student

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Gergely WintschePart I / 7 – Coloring and folding regular solids, Introduction – Around the word The answers –wiki

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Gergely WintschePart I / 8 – Coloring and folding regular solids, Introduction – Around the word The answers – wiki

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Gergely WintschePart I / 9 – Coloring and folding regular solids, Introduction – Around the word The answers – Marriam-Webster dictionary

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Gergely WintschePart I / 10 – Coloring and folding regular solids, Coloring the cube The frame of the cube

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Gergely WintschePart I / 11 – Coloring and folding regular solids, Coloring the cube The possible frames of the cube

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Gergely WintschePart I / 12 – Coloring and folding regular solids, Coloring the cube Coloring the opposite faces

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Gergely WintschePart I / 13 – Coloring and folding regular solids, Coloring the cube Coloring the opposite faces

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Gergely WintschePart I / 14 – Coloring and folding regular solids, Coloring the cube Coloring the matching vertices

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Gergely WintschePart I / 15 – Coloring and folding regular solids, Coloring the cube Coloring the matching vertices

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Gergely WintschePart I / 16 – Coloring and folding regular solids, Coloring the cube Coloring the faces of the cube with (exactly) two colors

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Gergely WintschePart I / 17 – Coloring and folding regular solids, Coloring the cube Coloring the faces of the cube with (exactly) two colors

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Gergely WintschePart I / 18 – Coloring and folding regular solids, Coloring the cube Coloring the faces of the cube with (exactly) six colors

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Gergely WintschePart I / 19 – Coloring and folding regular solids, Coloring the cube Coloring the faces of the cube with (exactly) six colors

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Gergely WintschePart I / 20 – Coloring and folding regular solids, Coloring the cube Coloring the faces of the cube with (exactly) six colors

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Gergely WintschePart I / 21 – Coloring and folding regular solids, Coloring the cube Coloring the faces of the cube with (exactly) six colors These three faces fix the cube in the space so the remaining three faces are colorable 3·2·1=6 different ways. The total number of different colorings are 5·6=30.

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Gergely WintschePart I / 22 – Coloring and folding regular solids, Coloring the tetrahedron Coloring the faces of the tetrahedron with (exactly) four colors

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Gergely WintschePart I / 23 – Coloring and folding regular solids, Coloring the tetrahedron Coloring the faces of the tetrahedron with (exactly) four colors

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Gergely WintschePart I / 24 – Coloring and folding regular solids, Coloring the octahedron Coloring the faces of the octahedron (exactly) eight colors

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Gergely WintschePart I / 25 – Coloring and folding regular solids, Coloring the octahedron Coloring the faces of the octahedron with (exactly) four colors

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Gergely WintschePart I / 26 – Coloring and folding regular solids, Coloring the octahedron Coloring the faces of the octahedron with (exactly) four colors

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Gergely WintschePart I / 27 – Coloring and folding regular solids, Coloring the octahedron Coloring the faces of the octahedron with (exactly) four colors

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Gergely WintschePart I / 28 – Coloring and folding regular solids, Coloring the football Coloring the faces of the truncated icosahedron

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Gergely WintschePart I / 29 – Coloring and folding regular solids, Symmetry

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Gergely WintschePart I / 30 – Coloring and folding regular solids, Symmetry

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Gergely WintschePart I / 31 – Coloring and folding regular solids, Symmetry

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Gergely WintschePart I / 32 – Coloring and folding regular solids, Symmetry

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Gergely WintschePart I / 33 – Coloring and folding regular solids, Symmetry

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Gergely WintschePart I / 34 – Coloring and folding regular solids, Symmetry

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Gergely WintschePart I / 35 – Coloring and folding regular solids, Symmetry

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Gergely WintschePart I / 36 – Coloring and folding regular solids, Symmetry

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Gergely WintschePart I / 37 – Coloring and folding regular solids, Summa Summarize

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Gergely WintschePart I / 38 – Coloring and folding regular solids, Outlook

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Gergely WintschePart I / 39 – Coloring and folding regular solids, Outlook

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Gergely WintschePart I / 40 – Coloring and folding regular solids, Outlook The case of cube

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Gergely WintschePart I / 41 – Coloring and folding regular solids, Outlook The case of cube

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