JSS3: BASIC TECHNOLOGY - 1ST TERM
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Materials & Processing - Timber I | Week 16 Topics|1 Quiz
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Materials & Processing - Timber II | Week 24 Topics|1 Quiz
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Processing of Materials - Metals | Week 35 Topics|1 Quiz
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Processing of Clay, Ceramics and Glass | Week 45 Topics|1 Quiz
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Methods of Producing Plastics & Rubber | Week 52 Topics|1 Quiz
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Drawing Practice - Isometric Drawing | Week 64 Topics|1 Quiz
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Oblique Projection | Week 72 Topics|1 Quiz
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Orthographic Projection | Week 84 Topics|1 Quiz
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Perspective Drawing (One - Point Perspective Drawing) | Week 94 Topics|1 Quiz
Principal Planes of Orthographic Projection
Topic Content:
- Principal Planes of Orthographic Projection
Orthographic projection uses two main planes called the principal planes of projection, they are the vertical plane planes and the horizontal planes.
These two planes intersect, producing four quadrants. The object to be drawn is imagined to be placed in one of these quadrants, and orthographic views of it are projected onto the
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