-Dateien/image001.gif)
The distance of a line has a certain length and has two
end points. They are defined as or just a.
-Dateien/image004.gif)
A half straight line is a line with an ending point. It
is defined with a minor letter, s for example.
-Dateien/image005.gif)
A strait is a line without a definite ending point. We
indicate this with a small letter, usually g or h…
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