þrívíð

þrívíð is an Icelandic word that translates to "three-dimensional" in English. It refers to something that has length, width, and depth, possessing volume and existing in space. This concept is fundamental in various fields, including mathematics, physics, art, and computer graphics.

In geometry, three-dimensional objects are contrasted with two-dimensional figures, which only have length and width and exist on a plane. Examples of three-dimensional shapes include cubes, spheres, and pyramids. The study of three-dimensional geometry involves understanding properties like volume, surface area, and spatial relationships between objects.

In physics, the universe is generally understood as being three-dimensional in space, with time being a fourth dimension in the context of spacetime. Physical phenomena are often described and analyzed within a three-dimensional framework.

Art and design also heavily utilize the concept of three-dimensionality. Sculptures, architecture, and even paintings that employ techniques like perspective aim to create an illusion of depth and volume, evoking a sense of three-dimensional space for the viewer. Computer graphics heavily rely on the principles of three-dimensional modeling and rendering to create realistic or stylized virtual environments and objects. The term þrívíð is therefore a versatile descriptor for anything possessing spatial extent.