Definition:Angle/Vertex

From ProofWiki
Jump to navigation Jump to search

Definition

The point at which the arms of an angle meet is known as the vertex of that angle.


Historical Note

While the term is used throughout Euclid's The Elements, the concept of the vertex of an angle is never formally defined there.


Linguistic Note

The plural of vertex is vertices.

The word vertex is Latin for peak, from which the irregular plural form.


Sources