They will be asked to draw lines of symmetry on these shapes. A 57 sided shape is called a pentacontaheptagon. In Year 2, children will start to look at symmetry in squares and rectangles. The name for a 57 sided shape is derived by combining the name for a 50 sided shape with the name for a 7 sided shape. For example, a 46-sided polygon could be called a tetracontakai-hexagon, or a combination of “tetracon-tagon” + “kai” (often used in combining names) + “hexagon.” To shorten such long names, mathematicians often use “n-gon” to simplify matters thus, 46 would be 46-gon a much easier name to remember and even say. In Year 1 children will learn the names of 2D shapes, such as rectangles and squares.They may be shown 3D shapes and asked to say if these have square or rectangular faces. If you feel like making up your own name, try constructing some sided polygons. Some texts list a two-sided polygon as a “digon,” but this is only meant for theoretical mathematics. In geometry, a heptagon is a seven-sided polygon or 7-gon. Hendecagon or undecagon (even less frequently as unidecagon) It is also possible to substitute “n-gon,” when the name is not known (for example 14-gon or 20-gon). Learn the properties, formula and examples of heptagons with BYJU'S. It can be regular or irregular, convex or concave. The following lists some of the names of polygons, depending on the number of sides. A heptagon is a polygon with 7 sides and 7 angles. A polygon with n sides is called an n-gon. Best Answer Copy A 7 sided shape is called a heptagon. Polygons are classified according to the number of sides they have. A shape can be defined as the boundary or outline of an object which is made by combining curves, points, and line segments.
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