Geometry · Points, Lines & Angles
Vertex
HSG-CO.A.1
Definition
The common point where two rays of an angle, or two sides of a polygon, meet.
Examples
- The vertex B is the common endpoint (corner) where the two rays of angle ABC meet.
- A triangle has three vertices, one at each corner.
Key rule
The vertex is always the corner point where two rays or sides meet.
Memory hook
The corner point where things meet.