Difference between revisions of "Parallelogram"
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(Added rhombus subset) |
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* Adjacent angles sum to 180<sup>0</sup> | * Adjacent angles sum to 180<sup>0</sup> | ||
* It has rotational symmetry of order at least 2. | * It has rotational symmetry of order at least 2. | ||
| + | * 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]] is a subset of the set parallelograms. | ||
[[category:geometry]] | [[category:geometry]] | ||
Revision as of 23:06, April 27, 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.