Hidden line

Hidden lines add geometric information about the unseen sides of an object.

To draw higher dimensional cubes, hypercubes, without hidden lines, make the faces opaque.

Hidden lines represent edges of a physical object that are not visible from a specific viewpoint.

In a computer drawing application the option may be referred to a wire frame with hidden edges.

Removing hidden lines is important in computer design and graphics applications.

Cubes with hidden lines: dotted, dashed, and thin lines. Cubes with no hidden lines, and a cube with dotted lines to give 3 dimensional reference
Wire-frame cube, icosahedron, and sphere
A wire-frame image using hidden-line removal