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en.wikipedia.org/wiki/Vertex_(geometry)

The vertex of an angle is the point where two rays begin or meet, where two line segments join or meet, where two lines intersect (cross), or any appropriate combination of rays, segments and lines that result in two straight "sides" meeting at one place.. Of a polytope. A vertex is a corner point of a polygon, polyhedron, or other higher-dimensional polytope, formed by the intersection ...

www.mathsisfun.com/geometry/vertices-faces-edges.html

Vertices, Edges and Faces. A vertex is a corner. An edge is a line segment between faces. A face is a single flat surface. Let us look more closely at each of those: Vertices . A vertex (plural: vertices) is a point where two or more line segments meet. It is a Corner. This tetrahedron has 4 vertices.

www.rdocumentation.org/packages/igraph/versions/0.7.1/topics/Vertex shapes

Arguments shape Character scalar, name of a vertex shape. If it is NULL for vertex.shapes, then the names of all defined vertex shapes are returned. clip An R function object, the clipping function. plot An R function object, the plotting function.

stackoverflow.com/questions/7429162/how-to-use-igraph-vertex-shape-functionality

When you plot them you can have them as rectangles or circles or some other shapes. Whatever you think looks prettiest. Start by looking at the example on the ?igraph.vertex.shapes page. g <- graph.ring(10, dir=TRUE, mut=TRUE) plot(g, vertex.shape="rectangle", layout=layout.circle) The allowed values for the vertex.shape argument are given by

docs.microsoft.com/en-us/office/vba/api/PowerPoint.Shape.Vertices

Example. This example assigns the vertex coordinates for shape one on myDocument to the array variable vertArray() and displays the coordinates for the first vertex.. Set myDocument = ActivePresentation.Slides(1) With myDocument.Shapes(1) vertArray = .Vertices x1 = vertArray(1, 1) y1 = vertArray(1, 2) MsgBox "First vertex coordinates: " & x1 & ", " & y1 End With

mathopenref.com/vertex.html

Vertex of a Parabola. A parabola is the shape defined by a quadratic equation. The vertex is the peak in the curve as shown on the right. The peak will be pointing either downwards or upwards depending on the sign of the x 2 term.. For more on quadratic equations and the parabolas they define see Quadratic Explorer where you can experiment with the equation and see the effects on the resulting ...

processing.org/reference/beginShape_.html

After calling the beginShape() function, a series of vertex() commands must follow. To stop drawing the shape, call endShape(). The vertex() function with two parameters specifies a position in 2D and the vertex() function with three parameters specifies a position in 3D. Each shape will be outlined with the current stroke color and filled with ...

rdrr.io/cran/igraph/man/shapes.html

shape: Character scalar, name of a vertex shape. If it is NULL for shapes, then the names of all defined vertex shapes are returned. coords, el, params, end, v: See parameters of the clipping/plotting functions below. clip

sciencing.com/vertices-math-5066316.html

A vertex is a mathematical word for a corner. Most geometrical shapes, whether two or three dimensional, possess vertices. For instance, a square has four vertices, which are its four corners. A vertex can also refer to a point in an angle or in a graphical representation of an equation.

www.mathsisfun.com/definitions/vertex.html

Vertex. more ... A point where two or more line segments meet. A corner. Examples: • any corner of a pentagon (a plane shape) • any corner of a tetrahedron (a solid) (The plural of vertex is "vertices".) See: Vertex (parabola) Vertices, Edges and Faces.

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