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* To join two points with a line, I actually set the Turtle on a point, set its heading (the direction it was pointing) and sent it off in that direction both to draw the second point and to draw the line joining the points.

* To extend a line, I drew it, and then told the Turtle to go forward in the same direction.

* To draw a circle, I put the Turtle at the outer end of the line, and told it the radius length.









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