Monday, June 21, 2010

Symmetry


Symmetry:

Introduction:


In mathematics, Symmetry usually conveys two primary meanings. The first meaning is aesthetically pleasing proportionality and an imprecise sense of harmonious. The second meaning is "patterned self-similarity" that can be proved according to the rules of a formal system.Although the meanings are distinguishable in some contexts, both meanings of "symmetry" are related and discussed in parallel.

The "precise" notions of symmetry have various measures and operational definitions. For example, symmetry may be observed:

* with respect to the passage of time;
* as a spatial relationship;
* through geometric transformations such as scaling, reflection, and rotation;
* through other kinds of functional transformations; and
* as an aspect of abstract objects, theoretic models, language, music and even knowledge itself.

The best way to understand about symmetry is by learning about the Types of Symmetry:

Properties of Reflection symmetry:


Reflection symmetry is symmetry which includes mirror symmetry, mirror-image symmetry, or bilateral symmetry. In 1D, the point of symmetry is available. I

In 2D, an axis of symmetry is available. In 3D, the plane of symmetry is available. Mirror symmetric is nothing but an object or figure which is indistinguishable from its transformed image.

The symmetry of a two-dimensional shape is a line, if any two points lying on the perpendicular at equal distances from the axis of symmetry are identical. When any of the shape was to be folded in half over the axis then the two halves would be identical.

Symmetry of isosceles is the triangles and the kites and the isosceles trapezoids are the symmetry of quadrilaterals.


Properties of Rotational symmetry:


Rotational symmetry is also symmetry in which some or all rotations in m-dimensional Euclidean space.

Rotational symmetry is direct isometrics.

In the rotational symmetry we can take that point as origin. The rotational symmetry forms the special orthogonal group in which the group of m×m orthogonal matrices with determinant 1.


We will discuss about the various types of Symmetry in Detail in the next blogs to come,here is a list of the various types of Symmetry in Geometry:

Symmetry in geometry

* Reflection symmetry
* Rotational symmetry
* Translational symmetry
* Glide reflection symmetry
* Rotoreflection symmetry
* Helical symmetry
* Non-isometric symmetries
* Scale symmetry and fractals

Hope you like the above example of Symmetry.Please leave your comments, if you have any doubts.

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