Unit 1ProjectionsMEDIUM

Projection of Square Lamina

A square lamina ABCD of 45mm side has corner A on HP and diagonal AC perpendicular to HP and inclined at 40° to VP. Draw its projections.

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Solution Diagram

Solution diagram for Projection of Square Lamina
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Step-by-Step Construction

  1. 1

    Since AC is perpendicular to HP, in TV it appears as a point

  2. 2

    In FV, AC makes 40° with XY, with A on XY

  3. 3

    Diagonal length = 45√2 = 63.64mm

  4. 4

    Points B and D are equidistant from AC and perpendicular to it

  5. 5

    Distance of B,D from AC = side/√2 = 31.82mm

  6. 6

    Complete projections with all four corners

Pro Tips

  • •Always verify your measurements with a scale before finalizing the drawing
  • •Use construction lines lightly and darken the final solution
  • •Label all important points and reference lines clearly

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