• 2.1-2.2 Isometric Drawing

    • A. Learning Objectives

      • Change orthographic views into isometric drawings

    • B. Notes

      • An isometric drawing is a three-dimensional drawing created on a flat two-dimensional surface. The drawing shows three views of the image. The views are the top and two sides. The drawing will have width, height, and depth.
      • Drawing an isometric sketch is created using three axes. One axis is vertical, and the other two are connected horizontally to the vertical axis. The horizontal axes are created using 30-degree angles.
      • To create an isometric drawing, first start with a predetermined vertical line to establish the height. Then, using the bottom point on the vertical line, draw a horizontal line at a 30-degree angle to establish either the width or the depth of the image. Repeat the same process on the other side of the vertical line to create the other dimension. This process is repeated for the top point on the vertical line. The lines should appear to be creating the image and can then be connected to close the image.


      Isometric drawing of a cube: 

    • Examples in First Angle Projection



    • C. Coursework










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    • 2017-DSE-DAT-2E-Q13ai (modified)
      The figure below shows two views of a milk box.


      In the space provided below, with the aid of drawing tools, use A as the lowest point to produce an isometric drawing of the milk box. (Neglect the thickness of material.)
      (6 marks)

      Marking scheme (6 marks)
      • Box shape: Body, gable top, top fin (@1x3)
      • Using A as the lowest point (1)
      • Conform to isometric drawing method (1)
      • In proportion (1)

    • How to Draw Parallel Lines

    • Marking scheme (6 marks)
      • Box shape: Body, gable top, top fin (@1x3)
      • Using A as the lowest point (1)
      • Conform to isometric drawing method (1)
      • In proportion (1)


      Samples of Candidates' Performance (p.46, 51)

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    • Worksheet Page 1 Solution 網址
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    • Worksheet Page 2 Solution (Sketchup) 網址
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    • D. Enrichment (optional)

      • Use Tinkercad to draw any 3D figure(s) from Q3-6.

    • Join into 2S Tinkercad classroom 網址
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    • Join into 2M Tinkercad classroom 網址
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    • Join into 2A Tinkercad classroom 網址
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    • Join into 2R Tinkercad classroom 網址
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    • Join into 2T Tinkercad classroom 網址
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