In geometry, a vertex (plural: vertices) is a point where two or more line segments, lines, or rays meet to form an angle. The word "vertex" is derived from the Latin word "vertex," which means the highest point or the topmost part of something. In the context of geometry, it refers to the point of intersection.

There are different types of vertices based on the shapes they belong to:

**Vertex of a Polygon:**In a polygon, the vertices are the corner points where the sides of the polygon meet. For example, a triangle has three vertices, a square has four vertices, and so on.**Vertex of a Polyhedron:**In a polyhedron (a three-dimensional shape with flat polygonal faces), the vertices are the corner points where the edges of the polyhedron meet. For example, a cube has eight vertices, a pyramid has five vertices, and so on.**Vertex of a Graph:**In graph theory, a vertex is a fundamental unit of which graphs are formed. A vertex in a graph represents a point or an object, and the edges of the graph represent the connections or relationships between the vertices.

To understand vertices better, it's important to practice identifying and counting vertices in different shapes and figures. Here are some key points to keep in mind while studying vertices:

- Identify the vertices of various polygons such as triangles, quadrilaterals, pentagons, hexagons, and so on.
- Explore the vertices of different polyhedra including cubes, prisms, pyramids, and other three-dimensional shapes.
- Understand the concept of vertices in graph theory and how they are connected by edges to form a network.
- Practice drawing shapes and figures and label their vertices to reinforce the concept visually.
- Work on problems and exercises that involve counting and determining the properties of vertices in different contexts.

Study GuideShapes Worksheet/Answer key

Shapes Worksheet/Answer key

Shapes Worksheet/Answer key

Shapes Worksheet/Answer key

Shapes Worksheet/Answer key

Shapes Worksheet/Answer key

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Shapes Vocabulary/Answer key

Shapes Vocabulary/Answer key

Shapes

Geometry (NCTM)

Analyze characteristics and properties of two- and three-dimensional geometric shapes and develop mathematical arguments about geometric relationships.

Identify, compare, and analyze attributes of two- and three-dimensional shapes and develop vocabulary to describe the attributes.

Classify two- and three-dimensional shapes according to their properties and develop definitions of classes of shapes such as triangles and pyramids.

Use visualization, spatial reasoning, and geometric modeling to solve problems.

Recognize geometric ideas and relationships and apply them to other disciplines and to problems that arise in the classroom or in everyday life.