PREV_ARC2 defines a circular preview arc based on center point, radius and central angle from startangle to endangle. PREV_ARC2 is similar to ARC2. 
Syntax
PREV_ARC2 x, y, r, startangle, endangle
Parameters
x (decimal): X coordinate of center point
y (decimal): Y coordinate of center point
r (decimal): radius length 
startangle (decimal): startangle (in degrees) 
endangle (decimal): endangle (in degrees) 
Remarks
The angular offset is based on the (local) X axis; positive direction is counterclockwise. 
Startangle and endangle are in degrees.
Usable since script version 1.1 (Allplan 2012-1).
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