| A | B |
|---|
| Blocking in | the process of using orthographic projection in creating the views of a multi-view drawing |
| Depth | the horizontal distance measured from the front to the back of an object |
| Engineering working drawings | drawings used to manufacture of construct objects |
| First-angle projection | a method of orthographic projection in which views of an object a projected to the sides of an imaginary glass box and away from the viewer |
| Foreshortening | when the surface of an object is drawn smaller than true size and shape |
| Frontal plan | represents the projection for the front view of an object |
| Height | the vertical distance measured from the bottom to the top of an object |
| Horizontal plane | represents the projection for the top view of the object |
| Mechanical drawing | a drawing made with the aid of instruments |
| Multi-view drawing | a drawing that requires more than one two-dimensional view in order to provide an accurate shape and size description of the object being produced |
| Negative mass | how features of an object are physically represented |
| Object feature | physical characteristics of an object |
| Orthographic projection | a method of showing a three-dimensional object in two dimensions by displaying various views |
| Positive mass | the solid block of mass |
| Primary projection plane | the face of the glass box to which the primary view of a given feature is projected |
| Primary view | in a multi-view drawing, a view in which an object feature appears in its true shape and size. |
| Principal planes | in orthographic projection, the frontal, profile, and horizontal planes used to project views of an object |
| Principal views | the six basic views (front, top, right side, left side, rear, and bottom) used to develop three-dimensional objects in orthographic projection |
| Profile plane | represents the projection for the side view of the object |
| Projection plane | the point of view that is projected |
| Third-angle projection | a method of orthographic projection in which views of an object are projected to the sides of an imaginary glass box and toward the viewer |
| True face | in orthographic projection, an object surface drawing in its true shape and size within in a view |
| Width | the horizontal distance measured across an object from side to side |
