Third angle orthographic drawing.

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Third angle orthographic drawing.

• British Standard conventions.

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plan view
end view
front view
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Copy this drawing. Add labels to show which view
is which.
Box dimensions 40mm x 20mm x 20mm
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Extend all construction lines, then add a 45
line to show where the end view should go. When
the drawings get more complicated you will find
this essential.
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Draw more complex shapes. You may wish to use
lego or maths blocks to help you.
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The graphic symbol for third angle orthographic
drawing is this
This is a cone drawn from front and end view.

• Add this symbol to your drawings.

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British Standard Conventions
When you add measurements to your drawings you
must do it in a certain way.

• Write the number only above the line, use only
  two dimensions to do this.
• Use small arrow heads (about 2mm).
• Use construction lines to show where measurements
  link to in the drawing.
• Write on the page all measurements in mm.

Use British Standard Conventions to add
meaurements to your drawings