Arc Command

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Arc[ <Circle>, <Point M >, <Point N> ]
the points M and N belong to the circle, returns the arc of the circle between M and N counterclockwise.


Arc[ <Ellipse>, <Point M>, <Point N> ]
the points M and N belong to the ellipse, returns the arc of the ellipse between M and N counterclockwise.


Arc[ <Circle>, <Parameter Value>, <Parameter Value> ]
Returns a circle section arc between two parameter values on a circle.
Note: Internally the following parametric forms are used:
Circle: (r cos(t), r sin(t)) where r is the circle's radius.


Arc[ <Ellipse>, <Parameter Value>, <Parameter Value> ]
Returns a conic section arc between two parameter values on an ellipse.
Note: Internally the following parametric forms are used:
Ellipse: (a cos(t), b sin(t)) where a and b are the lengths of the semimajor and semiminor axes.
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