Hidden Lines and Views

When drawing three dimensional objects, it is customary to show edges that are behind faces with dashed lines.  These are called "hidden lines" or "hidden edges."  For example, the cube on the left would be drawn as on the right, where edges CG, HG, and FG are hidden edges.

Engineers often draw "views" of solids from various angles.  Here is an example of an object with its front and right views.  Hidden lines are very important in views so the engineer can understand the drawings.

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