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  • Preface


    • 2 dim Space
    ("Plane")    		 3 dim Space
    ("Space")
    Symmetrical position of two points
    (Hyperplane-symmetry)    		 Point-, Line-Symmetry Point-, Line-, Plane-Symmetry
    Symmetrical position of two subsets
    (Hyperplane-symmetry)    		 Point-, Line-Symmetry Point-, Line-, Plane-Symmetry
    Symmetrical
    figures    		 Hyperplane-symmetry Point-, Line-Symmetrical Point-, Line-, Plane-Symmetrical
    Rotationally symmetcal ♦ ♦
    Implication of symmetric figures ♦ ♦
    Symmetry of primary figures An Essential Classification of Polygons —