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JSS3: BASIC TECHNOLOGY - 1ST TERM

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  1. Materials & Processing - Timber I | Week 1
    5Topics
    |
    1 Quiz
  2. Materials & Processing - Timber II | Week 2
    3Topics
    |
    1 Quiz
  3. Processing of Materials - Metals | Week 3
    5Topics
    |
    1 Quiz
  4. Processing of Clay, Ceramics and Glass | Week 4
    5Topics
    |
    1 Quiz
  5. Methods of Producing Plastics & Rubber | Week 5
    2Topics
    |
    1 Quiz
  6. Drawing Practice - Isometric Drawing | Week 6
    4Topics
    |
    1 Quiz
  7. Oblique Projection | Week 7
    2Topics
    |
    1 Quiz
  8. Orthographic Projection | Week 8
    4Topics
    |
    1 Quiz
  9. Perspective Drawing (One - Point Perspective Drawing) | Week 9
    4Topics
    |
    1 Quiz

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    JSS3: BASIC TECHNOLOGY – 1ST TERM Orthographic Projection | Week 8 Meaning of Orthographic Projection
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    Lesson 8, Topic 1
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    Meaning of Orthographic Projection

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    Orthographic projection is a method of drawing an object by means of plane views. While isometric projection drawing looks at all the three views (or faces) of an object together, orthographic projection looks at the same three views separately but linked together.

    orthographic projection

    Orthographic projection is the only drawing that shows the shape, angles, and size of each part of the article to be constructed as they really are. Because of this peculiar characteristic, it is one of the universally accepted drawings in the construction industry, therefore the drawing is usually used for production purposes.

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