On line guide/help
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Draw a circle
The <circle> element prints a circle centered at the specified x,y coordinates (required parameters) and with radius r (required parameter).
Parameters
Elements / attributes of the <circle> element:
Main required parameters
<x> (numeric, float) Center X coordinate
<y> (numeric, float) Center Y coordinate
<r> (numeric, float) Circle radius
Other optional parameters:
<startangle> Starting angle of the circle in degrees, from 0 to 360. Default value if not specified: 0
<endangle> Arrival angle of the circle in degrees, from 0 to 360. Default value if not specified: 360
<linestyle> Sets the line style for the circle border (if not set, the default line style will be used)