Orthographic and isometric - Introduction to AutoCAD 2011: 2D and 3D Design - page 154

Fig. 7.5 Making the layer Centre current from the Home/Layers panel

60

Dimensions
in millimetres

R40

Hole Ø40

R20

R20

R10

Ø120

Ø60

Ø40

Name: Scale: Date: Title:

A. Student 1:1 19/07/2006 PART 7/45/EB

Fig. 7.6 The completed working drawing of the solid

First angle and third angle

There are two types of orthographic projection - fi rst angle and third
angle . Fig. 7.7 is a pictorial drawing of the solid used to demonstrate the
two angles. Fig. 7.8 shows a three-view fi rst angle projection and Fig. 7.9
the same views in third angle .