- antiparallelogram
__n.__quadrilateral with two sides parallel and two not parallel.

*Dictionary of difficult words.
2015.*

- antiparallelogram
__n.__quadrilateral with two sides parallel and two not parallel.

*Dictionary of difficult words.
2015.*

**Antiparallelogram**— An antiparallelogram An antiparallelogram (also called a contraparallelogram[1] or crossed parallelogram[2]) is a quadrilateral in which, like a parallelogram, the p … Wikipedia**antiparallelogram**— noun A quadrilateral in which the pairs of nonadjacent sides are congruent, but in which two opposite sides intersect and are therefore not parallel. Syn: contraparallelogram … Wiktionary**Rectangle**— Family Orthotope Type Quadrilateral Edges and vertices 4 Schläfli symbol {}x{} … Wikipedia**Parallelogram**— In geometry, a parallelogram is a quadrilateral with two sets of parallel sides. The opposite sides of a parallelogram are of equal length, and the opposite angles of a parallelogram are congruent. The three dimensional counterpart of a… … Wikipedia**Cyclic quadrilateral**— Cyclic quadrilaterals. In Euclidean geometry, a cyclic quadrilateral is a quadrilateral whose vertices all lie on a single circle. This circle is called the circumcircle or circumscribed circle, and the vertices are said to be concyclic. Other… … Wikipedia**List of mathematics articles (A)**— NOTOC A A Beautiful Mind A Beautiful Mind (book) A Beautiful Mind (film) A Brief History of Time (film) A Course of Pure Mathematics A curious identity involving binomial coefficients A derivation of the discrete Fourier transform A equivalence A … Wikipedia**contraparallelogram**— noun antiparallelogram … Wiktionary