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Polygon

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Ways of Reading "Polygons" Polygon as Simplicial Complex Figure Enclosed by Lines Locus of Movement Umbrella Classification of Polygons from Viewpoint of "Symmetry" from Viewpoint of "Number of Vertices (Edges)" Convex and Concave Regular Polygon 多角形の内角の和 Angles Instruction of "Sum of Internal Angles of A Polygon" diagonal Triangle Quadrilateral