16 Machine Trades Print Reading Copyright Goodheart-Willcox Co., Inc. Basic Dimensions The top view contains the length and width of the part. The front view shows the length and height. The right side view gives the height and width. Note that each view contains only two required dimensions of the object. In most cases, any single view of a part does not have suffi cient information to describe the total size of the part. However, the missing view can be determined when any two of the three primary views—top, front, or right side— are given. Refer back to Figure 2-7 and carefully study the dimensions for each view. Surface Representation Each view contains two basic measurements needed to complete the part. These two measurements are the basis for developing an individual surface. Figure 2-9, for example, shows an object with front view A projected. In Figure 2-9, the front projected surface A has measurements for true size and shape. Any surface that is parallel to a viewing plane is drawn to true size and shape. True size and shape occurs when lines and surfaces on the projected view are identical to the corresponding lines and surfaces on the object. Note that projected surface A is identical to front view A of the object. In Figure 2-10, the top view represents surface C differently from how it appears on the object. On the object, surface C is angular, while the projected Goodheart-Willcox Publisher Standard third-angle, multiview drawing layout. Figure 2-7 Goodheart-Willcox Publisher Standard first-angle, multiview drawing layout. Figure 2-8 Goodheart-Willcox Publisher Projecting the image to show the front view including the basic dimensions needed to describe the surface. Figure 2-9