Q:

What are all the shapes and their names?

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Quick Answer

Shapes are defined as geometric objects that possess outlines or external surfaces. Common shape names include circle, oval, triangle, square, rectangle, cylinder, star, pyramid and heart.

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Full Answer

Shapes often have specific names depending on how many sides they have; a hexagon, for example, has six sides, as the Greek prefix for six is "hex." As there is no limit to how many sides a shape may have, there is no realistic way to compile a complete list of shapes. Shapes can be regularly named, however.

Some commonly understood, and uniquely named, two-dimensional shapes are squares, triangles and circles. Shapes with three through twenty sides often have unique names; above that, the names are constructed based on Greek or Latin prefixes. A 78-sided polygon, for example, would be a heptacontakaioctagon. This name is explained thus: "heptaconta" means "70," "kai," means "and" and "octa" means "eight." The name, translated, would be "70 and 8 sided shape."

These are all polygons, the blanket term for such shapes. Generally polygons can be regular or irregular; regular polygons have the same length of sides and are symmetrical, while irregular polygons are neither. The absolute limit on a polygon's sides is with an apeirogon. This geometric shape is a theoretical, degenerate geometric figure with an infinite number of sides.

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Related Questions

  • Q:

    What are irregular shapes?

    A:

    Irregular shapes are those with sides of different lengths and angles that are unequal. Regular shapes have sides with equal lengths and have angles of the same size.

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  • Q:

    What are some common shapes?

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    Some common shapes include the circle, the square and a triangle. Each of these shapes consists of either multiple lines or curves in some ratio.

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  • Q:

    What are 2-D and 3-D shapes?

    A:

    Two-dimensional, or 2-D, shapes are those that exist in only two dimensions while three-dimensional, or 3-D, shapes exist in three dimensions. Both 2-D and 3-D shapes typically have length and width dimensions, also referred to as "x" and "y" dimensions, but 3-D shapes also have a depth dimension in the "z" direction.

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  • Q:

    What shapes have no lines of symmetry?

    A:

    Some shapes that have no lines of symmetry include the scalene triangle and trapezium. A trapezium is a four-sided flat shape with straight sides, none of which are parallel. Outside of the United States, the trapezium is called the general irregular quadrilateral.

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