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Line Segments


\begin{displaymath}\overline{p_1 p_2}\end{displaymath}

Questions

*
Is \(\overline{p_0 p_1}\) clockwise (cw) or counterclockwise (ccw) of \(\overline{p_0 p_2}\)?



\psfig{figure=figures/f25-1.ps}

*
Turning direction from \(\overline{p_0 p_1}\) to \(\overline{p_1 p_2}\)?



\psfig{figure=figures/f25-2.ps}

*
Do \(\overline{p_1 p_2}\) and \(\overline{p_3 p_4}\) intersect?



\psfig{figure=figures/f25-3.ps}

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