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    By Martin Phelps

    Selecting two parallel lines when using the “Fillet” command will result in a Semi-Circle being placed at the end of the two lines, since the lines are parallel the value of the “Radius” will not affect the resulting “Fillet”. Figure 1 shows 3 examples of filleting parallel “Lines”.

    AutoCAD_-_Filleting_Parallel_Lines_-_1.JPG

    If the lines are different lengths this will influence the positioning of the resulting “Fillet” or semi-circle. The first line selected will retain its original length, the upper line in Figure 2 is longer than the lower line so the lower line will be extended to match the length of the top line.

    AutoCAD_-_Filleting_Parallel_Lines_-_2.JPG

    If the lines are picked in reverse order, the top line will be reduced in length to match the length of the lower line, as per Figure 3.

    AutoCAD_-_Filleting_Parallel_Lines_-_3.JPG