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A square matrix is one where the number of rows equals the number of columns.

Post-multiplication by I

Computer graphics uses square matrices for many purposes. Most transformations, such as changing the point of view in a 3D world or projecting it onto a 2D image, are done with square matrices.

Square matrices have properties that are not in general shared by other matrices. To get a taste of one of these properties, perform the following multiplication:

A I = C
parens parens parens parens parens parens

Try changing some of the elements of A (don't change elements of I) and click the = button.


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