Thursday, April 26, 2012

Symmetry in Nature

Kristian and Shim will now show you a very simple concept...

Symmetry in Nature!

Read more to find out!
There are many types of symmetry. A reflectional symmetry is is when a figure can be mapped onto itself by a reflection in the line.


There is also a rotational symmetry, when a figure can be mapped onto itself by a rotation of 180 degrees or less. 


When there's only one type of reflectional symmetry in a shape, then it is a bilateral symmetry.


Here are some examples of symmetry!


Two lines of symmetry can be seen with this plant. Rotational symmetry is also visible in this plant; the plant looks like itself after a rotation of 180 degrees.




There are six lines of symmetry visible here. The snowflake looks like itself after it is rotated about 45 degrees.





This bird has bilateral symmetry and has no rotational symmetry whatsoever.



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