triangle postulate

Fetched 2026-10-26 (cache).

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Noun

1. {{lb|en|geometry}} An [[axiom]] that states that the [[sum]] of the [[angle]]s in a [[triangle]] equals two [[right angle]]s, equivalent to the [[parallel postulate]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.