Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In geometry, an apex is a descriptive label for a visual singular highest or most distant point or vertex in an isosceles triangle, pyramid or cone, usually contrasting with the opposite side called the base. For an isosceles triangle the apex is the vertex where the two sides of equal length meet. n geometry, a vertex (plural vertices) is a special kind of point which describes the corners or intersections of geometric shapes. Vertices are commonly used in computer graphics to define the corners of surfaces (typically triangles) in 3D models, where each such point is given as a vector.

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