What is a vertex in geometric solids?

A vertex in geometric solids refers to the point where two edges of the solid meet. This concept is fundamental in understanding the structure of three-dimensional shapes, such as cubes, pyramids, and polyhedra. Each vertex represents a corner of the solid, contributing to its overall shape and design.

In the context of geometric solids, the other options represent different properties or characteristics that do not define what a vertex is. The surface area refers to the total area of the external surfaces of a solid, but does not imply any connection to vertices. The space contained within the solid refers to the volume, which is another distinct property. The distance between two faces relates to the spacing between flat surfaces of the solid, rather than the points where edges converge. Understanding vertices is crucial for various applications, including calculating surface area, volume, and studying the properties of geometrical figures.