JSS3: BASIC TECHNOLOGY - 1ST TERM
Materials & Processing - Timber I | Week 15 Topics|1 Quiz
Materials & Processing - Timber II | Week 23 Topics|1 Quiz
Processing of Materials - Metals | Week 35 Topics|1 Quiz
Processing of Clay, Ceramics and Glass | Week 45 Topics|1 Quiz
Methods of Producing Plastics & Rubber | Week 52 Topics|1 Quiz
Drawing Practice - Isometric Drawing | Week 64 Topics|1 Quiz
Oblique Projection | Week 72 Topics|1 Quiz
Orthographic Projection | Week 84 Topics|1 Quiz
Perspective Drawing (One - Point Perspective Drawing) | Week 94 Topics|1 Quiz
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Method of Oblique Projection
The two methods of Oblique projection are cavalier projection and cabinet projection
Cavalier Oblique Projection: In this projection, the receding axes (width) are drawn full size.
Cabinet Oblique Projection: the receding axes (width) are drawn half-size to reduce distortion, but they are dimensioned full size. This is used to draw furniture i.e. cabinets.
To draw a rectangular block of length 6cm, breadth 5.0cm and depth 2.0cm in oblique projection.
a. Construct the oblique axes with two right angles and the third at 45° to the horizontal.
b. Mark off on this axes, the length, breadth, and depth of the rectangular block.
c. Draw the necessary parallel lines to complete the block.