Difference between revisions of "Parallelogram"
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* Its area is equal to its base multiplied by its vertical height | * Its area is equal to its base multiplied by its vertical height | ||
| − | The set of [[rhombus|rhombuses]] is a subset of the set parallelograms. | + | The set of [[rhombus|rhombuses]] (rhombi) is a subset of the set parallelograms. |
[[category:geometry]] | [[category:geometry]] | ||
Revision as of 22:23, January 14, 2008
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 (rhombi) is a subset of the set parallelograms.