Pictorial Introduction to 'Graphics for The Blind'


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Braille picture ½ size

    Basic Editing in Geometry
  1. Orthogonal sign replaced by braille code.
  2. Orthogonal sign replaced by remark in text because there's no fitting palce to put braille code.
  3. Equal-angles signs replaced by remark in text.
  4. Equal-distances signs replaced by remark in text; to allow for that, characters P, Q and R were added.
  5. Parallel-lines signs replaced by remark in text.
  6. Arc not copied, Greek character preceded by braille code for 'angle.'
  7. Length statement replaced by, or at least repeated in text.

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© 1989, 2002 Marco Schuffelen All Rights Reserved

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