vertex
where the two rays making up the angle meet.
In mathematics, a vertex usually refers to a point where two or more lines or edges meet to form a corner or an angle. It is also known as a node in graph theory. The concept of vertex is commonly used in various branches of mathematics such as geometry, graph theory, topology, etc. In two-dimensional shapes like a triangle, the vertex is the meeting point of two sides. In three-dimensional shapes like a cube, each corner of the cube is a vertex. In graph theory, a vertex is a point or a node that is connected to other vertices through edges to form a graph. The number of vertices in a graph is an important characteristic of the graph, as it is used in various algorithms and mathematical properties of the graph.
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