3-D
From Wikipedia, the free encyclopedia
3-D (or 3D) means three dimensional, or having three dimensions. For example, a box is three dimensional; it has up and down, left and right, and front and back.
A dimension is measurable in inches, centimeters, miles, kilometers, or any other unit of length.
The three dimensions are called length (or depth), width (or breadth), and height.
3D graphics are used to make video games or animated movies. A lot of calculations are needed to make pictures seem three dimensional on a screen.
[change] In mathematics
In mathematics (maths), length, width, and height are given letters to make them easy to write. X is width, Y is height, and Z is length.
The mathematical study of shapes and dimensions is called geometry. Geometry can be used to measure how tall a mountain is.
[change] Time
Some people see time as a fourth dimension. It is also measured. It is measured in units of time such as seconds, hours, years, or any other measurement of time.
