Return the area of the loop interior, i.e. the region on the left side of the loop. The return value is between 0 and 4*Pi. (Note that the return value is not affected by whether this loop is a "hole" or a "shell".)
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Return the area of the loop interior, i.e. the region on the left side of the loop. The return value is between 0 and 4*Pi. (Note that the return value is not affected by whether this loop is a "hole" or a "shell".)