VERTEX: значение слова

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Merriam-Webster's Collegiate® Dictionary, 11th Edition

VERTEX

noun (plural vertices; also vertexes)
Etymology: Middle English, top of the head, from Latin vertic-, vertex, vortic-, vortex whirl, whirlpool, top of the head, summit, from vertere to turn
Date: 14th century
the top of the head,

2. the point opposite to and farthest from the base in a figure, a point (as of an angle, polygon, polyhedron, graph, or network) that terminates a line or curve or comprises the intersection of two or more lines or curves, a point where an axis of an ellipse, parabola, or hyperbola intersects the curve itself, a principal or highest point ; summit