Unit
2
Facilitator’s Guide G07 ~ Technology
IMPORTANT TERMINOLOGY
3-D artistic drawing An artistic impression of a 3-D object. Advanced techniques such as colour, texture, shading, shadows and perspective are used to create a drawing that resembles reality. 3-D oblique projection
A 3-D drawing where the side of a view is projected to one side at a 45° angle.
Conventions Lines used in drawings to depict specific parts of the drawn objects and to clearly communicate ideas. Isometric projection A 3-D drawing that uses lines drawn at 30°. Sketch Freehand drawings done in pencil – no other drawing instruments are used. Working drawings Drawings done with drawing instruments and which show a lot of detail.
LESSON 4: Graphical communication 1.1.2
© Impaq
First angle orthographic projection • 2-D drawings, also called orthographic projections, are drawings that show separate views of the same object – although the drawing is done in two dimensions. • We mainly use two types of orthographic projections in drawings, namely first and third angle projections. Learners will only learn about first angle projection. • The side of an object that shows the most detail will be the front view of the object.
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