Changes

213 bytes added ,  23:00, April 27, 2007
extended with properties
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[[Image:parallel.gif]]
 
[[Image:parallel.gif]]
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It has the following properties:
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* Opposite sides are equal
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* Diagonals bisect each other
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* Opposite angles are equal
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* Adjacent angles sum to 180<sup>0</sup>
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* It has rotational symmetry of order at least 2.
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[[category:geometry]]
 
[[category:geometry]]
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