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  1. We live in a four-dimensional universe defined by three spatial dimensions and one time dimension. In other words, it only takes three numbers to pinpoint your physical location at any given moment. On Earth, these coordinates break down to longitude, latitude and altitude representing the dimensions of length, width and height (or depth).
    science.howstuffworks.com/science-vs-myth/every…
    In our everyday world, we often use three dimensions: height (up and down), width (left and right) and depth (forward and backward) to describe the location of objects. These three dimensions create what's called 3D space.
    science.howstuffworks.com/science-vs-myth/every…
    The spatial dimensions—width, height, and depth—are the easiest to visualize. A horizontal line exists in one dimension because it has only length; a square is two-dimensional because it has length and width. Add depth and we get a cube, a three-dimensional shape. These three coordinates are used to pinpoint an object’s location in space.
    www.mentalfloss.com/article/501926/how-many-di…
    In geometry, a three dimensional shape can be defined as a solid figure or an object or shape that has three dimensions— length, width, and height. Unlike two dimensional shapes, three-dimensional shapes have height, which is the same as thickness or depth.
    www.splashlearn.com/math-vocabulary/geometry/…
    Shapes that can be measured in 3 directions are called three-dimensional shapes. These shapes are also called solids. Length, width, and height (or depth or thickness) are the three measurements of three-dimensional shapes.
    byjus.com/maths/three-dimensional-shapes/
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  3. Why Do We Live in Three Dimensions? - Universe Today

    Dec 26, 2011 · Using a supercomputer, they found that at the moment of the Big Bang, the universe had 10 dimensions – 9 spatial and 1 temporal – but only …

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    • How Many Dimensions Does Our Universe Really Have?

      Oct 16, 2021 · To break it down, the term “dimension” refers to any mathematical measurement. This can generally refer to a physical measurement (an object or space) or a temporal measurement (time). There are three dimensions that we …

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    • Why Does Our Universe Have 3 Dimensions? - Live …

      Oct 23, 2017 · We take for granted that we live in a world of three dimensions governed by the laws of physics, and don't often wonder why. But a group of physicists just hatched a new theory that they think may explain our three

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    • Why Does Our Universe Have Three Dimensions? - Live …

      Jan 20, 2012 · According to string theorists, there are the three full-sized spatial dimensions we experience every day, one dimension of time, and six extra dimensions crumpled up at the Planck scale like itty-bitty wads of paper.

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    • Three-dimensional space - Wikipedia

      In geometry, a three-dimensional space (3D space, 3-space or, rarely, tri-dimensional space) is a mathematical space in which three values (coordinates) are required to determine the position of a point. Most …

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