Credit:Ben MinersIkon ImagesGetty Images
Q:

# What are 3-D shapes?

A:

Three-dimensional shapes are solid shapes that exist in three dimensions, which include length, width and depth. The main difference between 3-D shapes and 1-D or 2-D shapes is that depth is incorporated along a third axis outside of the original 2-D plane.

Know More

Single-dimensional shapes exist only in one dimension, which means that they only possess length. Two-dimensional shapes have two dimensions, including length and width. These shapes are always flat. Examples of 2-D shapes are squares, triangles and circles. By adding an additional dimension to these 2-D shapes, many 3-D shapes can be constructed, such as cubes, pyramids and spheres. The mathematical term for a solid 3-D shape is "polyhedron."

Sources:

## Related Questions

• A:

Some commonly-known shapes are squares, circles, triangles, stars and rectangles. There are many different kinds of polygons used in geometry and many shapes that combine or arrange multiple polygons to be used in designs.

Filed Under:
• A:

Geometric shapes found in nature include pentagons, hexagons, spirals, waves and lines. These shapes are fascinating examples of mathematical laws being manifested by natural or biological means.

Filed Under:
• A:

To find the perimeter of any shape, the outside edges of the shape should be added together. The perimeter is defined as the distance that is around the outside of a two dimensional shape.