Describe shapes by vertices

A vertex is a point or corner where two straight sides of a two-dimensional shape meet. Learners identify and count the vertices of familiar shapes, such as triangles, rectangles, squares, and other simple polygons, regardless of their size or orientation, while recognizing that a circle has no vertices; formal angle measures, complex polygons, and three-dimensional vertices are beyond this understanding.

Detailed Explanation: Describe shapes by vertices

A vertex is a corner where two straight sides meet.

To count vertices:

Start at one corner.
Touch or point to each corner as you go around the shape.
Count each corner only once.

Example: How many vertices does this rectangle have?

Imagine a rectangle with corners labeled $A$ , $B$ , $C$ , and $D$ .

Corner $A$ is one vertex.
Corner $B$ is two vertices.
Corner $C$ is three vertices.
Corner $D$ is four vertices.

So, the rectangle has $4$ vertices.

Remember: A shape can be turned or made bigger, but its number of vertices stays the same. A circle has no vertices because it has no corners.

Learn by doing: Describe shapes by vertices

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Count Vertices on 2D Shapes

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Describe shapes by vertices

Detailed Explanation: Describe shapes by vertices

Learn by doing: Describe shapes by vertices

Practice with unlimited practice problems

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Count Vertices on 2D Shapes