Where in the real world can you find symmetric matrices?

Question

Mathematics

Please give a few examples of the use of symmetric matrices in the real world.
In addition to the multiplication table.
Thank you)

Answer 1

Chess field.

Answer 2

Correlation matrix.
Weight matrix in an undirected graph.

Answer 3

Any object.
Because it is equal to any identity matrix.
And the unit is also square, and it is symmetrical.
Those. (1) is a symmetric matrix.
Any body that has at least one axis of symmetry as the main diagonal and with a square partition will be an example of a symmetrical matrix.
Examples: a butterfly, a spoon, a tile, an umbrella, a bag, a pencil/pen, a backpack, any regular screen, any part of a window, a drawer, any part of a grid/grid, a person, etc.