It is the vertex at which all the triangular faces meet.
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An apex is the point at the top of a polyhedron where all the sides meet. example: the top of a pyramid.
The apex.
Well, at least in Polyhedrons, a Vertex is the point at the tip of a pyramid, apex is at the end of the cone.An apex is the top of a pyramid or cone. Technically, the apex is a vertex due to its vertex-like corner. Prisms DO NOT have apexes. They only have vertexes because they do not rise up like a pyramid.----------------------------------------------------------------An apex is usually pointed end of an object; the tip; a point of culmination.A vertex is usually the highest point or in mathematics , the point at which the sides of an angle intersect; the point on a triangle or pyramid opposite to and farthest away from its base.Some apexes may also be vertices.
A triangular-based pyramid has six edges: three in the base triangle and three from there to the apex.
One possibility is a heptagonal pyramid - with a heptagon as a base and seven triangular faces meeting at the apex.