Difference between revisions of "Parallelogram"
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| − | A parallelogram is a 4-sided [[polygon]] with opposite sides parallel. | + | A '''parallelogram''' is a 4-sided [[polygon]] with opposite sides parallel. |
[[Image:parallel.gif]] | [[Image:parallel.gif]] | ||
Revision as of 12:24, May 14, 2007
A parallelogram is a 4-sided polygon with opposite sides parallel.
It has the following properties:
- Opposite sides are equal
- Diagonals bisect each other
- Opposite angles are equal
- Adjacent angles sum to 1800
- It has rotational symmetry of order at least 2.
- Its area is equal to its base multiplied by its vertical height
The set of rhombuses is a subset of the set parallelograms.