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12.7.12  The exterior angle bisector: exbisector

The exbisector command takes as argument three points or a list of three points.

exbisector returns the bisector of the exterior angle of the triangle determined by the points; the first point is the vertex of the angle, the opposite of the first and second points determine one side of the angle and the first and third determine the second side.
Input:

exbisector(0,1,i)

Output:


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