What’s the plural of “vertex”?
Vertex is singular. The plural of vertex is vertexes or vertices.
The vertex of the angle is at the origin.
A square has four vertices.
The triangle has three vertex.
We marked the main vertices on the top of the mountain.
Is vertex singular or plural?
Vertex is singular. The plural of vertex is vertexes or vertices.
What’s a vertex? What’s the dictionary definition of vertex?
The word and noun vertex is defined as either “the top of the head”, or “the point opposite to and farthest from the base in a figure.”
Nouns that end in -ex and -xes/-ces
Irregular nouns that end in -ex often convert to –ces/-xes as a plural. This is a characteristic of Latin words.
| singular | plural |
|---|---|
| index | indexes and indices |
| matrix | matrices and matrixes |
| appendix | appendices or appendexes |
| codex | codices or codexes |
| vortex | vortices or vortexes |
| vertex | vertices or vertexes |
| apex | apices or apexes |
Vertex becomes vertices (or vertexes) in the plural, following the common -ex to -ices pattern seen in Latin-derived words.
Examples of “vertex” used in context
| Word Form | Examples |
|---|---|
| Other | Initially, every vertex has the same probability of being open to the flow of water.
The vertex of the hill. My cousin built his house on the vertex of the highest hill in the county. Last week, one of the students located the vertex of a parabola in a particularly elegant way. For each bit of information, we draw a vertex (or node), called a digit node. |
Examples of “vertexes”/”vertices” in sentences
| Word Form | Examples |
|---|---|
| Other | Using the ruler draw lines connecting the adjacent vertices of the hexagon.
This solid has 4 faces, 4 vertices and 6 edges. It consequently has four vertices and six edges. It has 12 pentagonal faces, and 30 edges, which intersect in fives to form 12 vertices. Two polyhedra are reciprocal when the faces and vertices of one correspond to the vertices and faces of the other. |
Synonyms of vertex
- pinnacle
- top
- crest
- zenith
- summit
- height
- tip
- apex
- Peak
Origin of the word vertex
From etymonline on vertex:
|
1560s, “the point opposite the base in geometry,” from Latin vertex “highest point,” literally “the turning point”. |
What’s the difference between they’re, their, and there?
Sources
- Definition of vertex.
- Synonyms for vertex.
- Origin of the word vertex.
Worksheet
According to the post, what is one acceptable plural form of “vertex”?
Is the word “vertex” singular or plural?
Which of the following sentences uses the correct form of “vertex” or its plural, based on the examples in the post?
Which plural form of “vertex” is also mentioned as correct in the post?
Words ending in -ex that come from Latin often form their plurals by changing to which endings?
The polygon had three , forming a triangle.
The angle’s is located at the origin point.
A cube has eight and twelve edges.
We needed to calculate the midpoint between two of the shape.
The diagram showed a single where the two lines met.
FAQs
What’s the plural of vertex?
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When do I use vertex vs. vertices?
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Are vertexes and vertices both correct?
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Why are there two plurals for vertex?
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Give an example of vertex used plurally.
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Yash, D. "What’s the Plural of Vertex?." Grammarflex, Jun 25, 2025, https://www.grammarflex.com/whats-the-plural-of-vertex/.
