Antiparallelogram

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

In geometry, an antiparallelogram is a type of self-crossing quadrilateral. Like a parallelogram, an antiparallelogram has two opposite pairs of equal-length sides, but these pairs of sides are not in general parallel.

Excerpt from the Wikipedia article “Antiparallelogram”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Michel Bakni, CC BY-SA 4.0, via Wikimedia Commons.