When studying basic Geometry in school, we learn to describe 2D and 3D shapes using three main words: Faces, Edges, and Vertices. Let's break down exactly what the 'Vertices' are when looking at a simple Triangle.
The word 'Vertex' comes from a Latin word meaning 'the highest point' or 'the peak'. This is why the sharp point at the very top of a pyramid or a cone is also called its vertex!
In geometry, a Vertex (singular) is a point where two straight lines or edges meet to form an angle. In simpler, everyday language, a vertex is the corner or the sharp point of a shape.
By definition, a triangle is a closed 2D polygon made of three straight lines. Because there are three lines intersecting, a triangle always has exactly 3 Vertices.
In mathematics, vertices are incredibly important because they give a shape its 'Name'.
A circle has **Zero (0)** vertices. Because a circle is made of one continuous, perfectly curved line, there are no straight lines that meet to form a sharp corner or an angle.
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