PARALLELOGRAM

Parallelogram

In Euclidean geometry, a parallelogram is a simple quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure. The congruence of opposite sides and opposite angles is a direct consequence of the Euclidean Parallel Postulate and neither condition can be proven without appealing to the Euclidean Parallel Postulate or one of its equivalent formulations. The three-dimensional counterpart of a parallelogram is a parallelepiped.

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parallelogram

Noun

  1. A convex quadrilateral in which each pair of opposite edges are parallel and of equal length.


The above text is a snippet from Wiktionary: parallelogram
and as such is available under the Creative Commons Attribution/Share-Alike License.

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