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A closed polyline with 3 points will result in a triangle - It can be a right-triangle, equilateral or isosceles.
Closed A closed polyline with 4 points can be recognized as rectanglea rectangle, square, parallelogram, trapezoidor trapezoid.
If the end point of parallel side in a any quadrangle is moved along a parallel lines, the property of parallelism is being kept.will be retained.
Right angles in quadrangle are adjusted as well.
Another form of polyline - star. At the input regular star is automatically generated, later it can be made irregular. Star can be edited by moving end points or inner/outer radius points.
Curved line is approximated by will also adjust automatically.
If the Polyline approximates a regular star a star polyline will be created. An additional set of controls are provided that allow the inner radii to be adjusted.
A curved will generate a spline, it can be closed and unclosed
Autocloud is created when closed curved line can be approximated with a cloud markupor open.
If a loopy or bumpy curve is drawn a cloud will be generated.
