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Vertex is a point on a polygon where the sides or edges of the object meet or where two rays or line segments meet. The plural of a vertex is vertices. For example, in the above figures, points A, B, C, D, and E are vertices. History.
In geometry, a vertex (pl.: vertices or vertexes) is a point where two or more curves, lines, or edges meet or intersect. As a consequence of this definition, the point where two lines meet to form an angle and the corners of polygons and polyhedra are vertices.
noun. , plural ver·tex·es, ver·ti·ces [vur, -t, uh, -seez]. the highest point of something; apex; summit; top: the vertex of a mountain. Anatomy, Zoology. the crown or top of the head. Craniometry. the highest point on the midsagittal plane of the skull or head viewed from the left side when the skull or head is in the Frankfurt horizontal.
A vertex (vertices for plural) is a point at which two or more sides or edges of a geometric figure meet. Vertex of an angle. The vertex of an angle is the common endpoint of two rays that make up the angle's sides. The vertex for angle BAC, written ∠BAC, is point A. The angle can also be named as ∠CAB or by only its vertex, ∠A.
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. Illustrated definition of Vertex: A point where two or more line segments meet. A corner.
About. Transcript. Sal rewrites the equation y=-5x^2-20x+15 in vertex form (by completing the square) in order to identify the vertex of the corresponding parabola. Created by Sal Khan and Monterey Institute for Technology and Education. Questions. Tips & Thanks. Want to join the conversation? Sort by: Top Voted. Neera Kapoor. 7 years ago.
Finding the vertex of the quadratic by using the equation x=-b/2a, and then substituting that answer for y in the orginal equation. Then, substitute the vertex into the vertex form equation, y=a(x-h)^2+k. (a will stay the same, h is x, and k is y).
