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
Steps in Orthographic Projection & Worked Illustration:
Topic Content:
- Step-by-Step Orthographic Projection
- Worked Illustration
- first angle orthographic projection
- third angle orthographic projection
- Worked Illustration
Illustration:
Draw the Isometric drawing object shown below, with the given dimensions, in first & third angle orthographic projection . The dimensions are in mm (1cm = 10mm).

First Angle Projection:
Steps:
a. Draw both the vertical and the horizontal axis to intersect midway.

b. Draw a 45° projection line from
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Drawing this was very hectic but rewarding, I’ve learnt a lot in a matter of minutes.
Thanks to the Kofastudy team ❤️😊