All About Symmetry

What Is Symmetry ?

What Is Symmetry ?

Symmetry comes from a Greek word meaning 'to measure together' and is widely used in the study of geometry. Mathematically, symmetry means that one shape becomes exactly like another when you move it in some way (turn, flip or slide).

For two objects to be symmetrical, they must be the same size and shape, with one object having a different orientation from the first. There can also be symmetry in one object, such as a face. If you draw a line of symmetry down the center of your face, you can see that the left side is a mirror image of the right side.

Types Of Symmetry

There are three basic types of symmetry: rotational symmetry, reflection symmetry and point symmetry.

Reflection Symmetry

Sometimes called line symmetry or mirror symmetry, reflection symmetry is when an object is reflected across a line, like looking in a mirror. The face above shows reflection symmetry. Here are some more examples of reflection symmetry.




The line of symmetry does not have to be vertical, it can go in any direction.

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