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2. Apex (geometry) - Wikipedia

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

   The term apex may used in different contexts: In an isosceles triangle, the apex is the vertex where the two sides of equal length meet, opposite the unequal third side. [1] Here the point A is the apex. In a pyramid or cone, the apex is the vertex at the "top" (opposite the base). In a pyramid, the vertex is the point that is part of all the ...

3. Glossary of graph theory - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_graph_theory

   A three-vertex independent set, the complement of a triangle. apex 1. An apex graph is a graph in which one vertex can be removed, leaving a planar subgraph. The removed vertex is called the apex. A k-apex graph is a graph that can be made planar by the removal of k vertices. 2. Synonym for universal vertex, a vertex adjacent to all other vertices.

4. Universal vertex - Wikipedia

   en.wikipedia.org/wiki/Universal_vertex

   In graph theory, a universal vertex is a vertex of an undirected graph that is adjacent to all other vertices of the graph. It may also be called a dominating vertex, as it forms a one-element dominating set in the graph. A graph that contains a universal vertex may be called a cone, and its universal vertex may be called the apex of the cone. [1]

5. Our Experts Think the Multitasking Shark APEX Vacuum Is ... - AOL

   www.aol.com/experts-think-multitasking-shark...

   We review the Shark APEX Powered Lift-Away Upright Vacuum with duoclean and zero-m technology, the best upright in our best vacuums round-up.

6. Shark's 'powerhouse' cordless Vertex vacuum is a jaw-dropping ...

   www.aol.com/lifestyle/shark-stick-vacuum-sucks...

   The Shark Vertex has so many features that make it a great vacuum to have around your place. For starters, it has intense, accelerated suction to get up way more pet hair and debris than you would ...

7. Vertex (geometry) - Wikipedia

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

   A vertex of an angle is the endpoint where two lines or rays come together. 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. [1] [2] [3]