Math Dictionary / Vertex
Vertex
A vertex is a corner point where two or more lines, rays, or sides meet.
GeometryGrade 4Grade 5Grade 6Grade 8Algebra 1SATACT
What it means
A triangle has three vertices, and a parabola has one turning-point vertex.
Also called: corner, turning point
Examples
| A square has 4 vertices |
| The vertex of an angle is where the rays meet |
| The vertex of a parabola is its highest or lowest point |
Common mistake
The plural of vertex is vertices.
Try one
Question: How many vertices does a triangle have?
Show answer
A triangle has 3 vertices.