36 lines
776 B
TeX
36 lines
776 B
TeX
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\begin{pspicture}*(-10,-5)(10,5)
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\psgrid[griddots=10, gridcolor=gray, subgriddiv =0](-10,-5)(10,5)
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\pspolygon[fillstyle = solid,fillcolor=lightgray, linestyle = dotted](-5,1)(-9,4)(5,-1)(9,-4)
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\pspolygon(-9,4)(1,2)(9,-4)(-1,-2)
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\psdot(-5,1)
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\uput[d](-5,1){$A$}
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\psdot(1,2)
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\uput[u](1,2){$B$}
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\psdot(-1,-2)
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\uput[d](-1,-2){$C$}
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\psdot(5,-1)
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\uput[u](5,-1){$D$}
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\psline[arrowsize=4pt 3]{->}(-5,1)(1,2)
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\uput[u](-2,1.5){$\vec{AB}$}
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\psline[arrowsize=4pt 3]{->}(-5,1)(-1,-2)
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\uput[dl](-3,-0.5){$\vec{AC}$}
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\psline[arrowsize=4pt 3]{->}(-5,1)(5,-1)
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\uput[u](0,0){$\vec{AD}$}
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\psdot(-9,4)
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\uput[d](-9,4){$I$}
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\psdot(9,-4)
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\uput[u](9,-4){$J$}
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\psline(-1,-2)(-9,4)
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\psline(,2)(9,-4)
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\end{pspicture}
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