Vertex Angle - Definition, Solid Shapes, Parabola, Examples
https://www.cuemath.com/geometry/vertex-definition/
WEBA vertex in math is a point where two lines or rays meet forming an angle at that point and is denoted by uppercase letters like A, O, P, etc. The plural of vertex is vertices. In solid geometry, i.e., 3D geometry, shapes such as cubes, cuboids form several vertices. Whereas in 2D shapes such as polygons form only a vertex.
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