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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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The dodecagon is the name of a 12-sided shape. This polygon also has 12 interior angles and 12 vertices. The sum of the interior angles of the dodecagon is 1,800 degrees.

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A six-sided shape is known as a hexagon. This refers to an item with a flat shape that has straight sides.

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A seven-sided shape is called a heptagon. Some people refer to heptagons as septagons, but this mixes a Greek suffix with a Latin prefix, so it is not the preferred usage.

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Some three-dimensional figures are spheres, cones, cylinders, pyramids and prisms. Other three-dimensional figures are octahedra, dodecahedra and icosahedra. Cubes and tetrahedra are some common variants of these major figures.

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The name of an eight-sided shape is an octagon. In addition to the eight sides, the octagon also has eight vertices and eight interior angles. The interior angles add up to 1080 degrees.

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A nine-sided shape is called a nonagon or enneagon. A nonagon is a type of polygon. Polygons are closed-plane figures that are made of line segments.

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There are many wood shaping tools depending on what project is being done. Saws, rasps and chisels are all used for wood carving and shaping.

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Unlike a regular shape, an irregular shape is a polygon with sides that aren't all equal and unequal angles. Some conventional geometric shapes, such as the rectangle, parallelogram and rhombus, are irregular. A rectangle has four 90 degree angles, but its sides aren't all the same length. A rhombus

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Sphere, torus, cylinder, cone, cube, triangular pyramid and square pyramid are some of the most common 3D shapes. There are certain characteristics and rules that apply for each one, and some of them can also be found in nature.