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- Basic Editing in Geometry
- Orthogonal sign replaced by braille code.
- Orthogonal sign replaced by remark in text
because there's no fitting palce to put braille code.
- Equal-angles signs replaced by remark in text.
- Equal-distances signs replaced by remark in text;
to allow for that, characters P, Q and R were added.
- Parallel-lines signs replaced by remark in text.
- Arc not copied, Greek character preceded by braille
code for 'angle.'
- Length statement replaced by, or at least repeated
in text.
Also note that different kinds of lines have been drawn
in various line types and widths.
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