Reference
Components
Arc
Description
The Arc primitive draws a portion of the edge of a circle or ellipse depending on whether the bounding area is square or rectangular
(Technically an arc is a portion of the circumference of a circle but here it is extended to ellipses as well). The arc is defined by the bounding
area in which it is to be drawn, a starting angle and an angle to indicate the amount of sweep (both in degrees), as well as by the pen object
to be used to draw the segment.
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