Difference between revisions of "Circle Command"

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;Circle[ <Point>, <Point>, <Point> ]:Yields a circle through the three given points (if they do not lie on the same line).
 
;Circle[ <Point>, <Point>, <Point> ]:Yields a circle through the three given points (if they do not lie on the same line).
  
{{Note|1=See also [[Image:Tool_Compasses.gif]] [[Compass Tool|Compass]], [[Image:Tool_Circle_Center_Point.gif]] [[Circle with Center through Point Tool|Circle with Center through Point]], [[Image:Tool_Circle_Center_Radius.gif]] [[Circle with Center and Radius Tool|Circle with Center and Radius]], and  [[Image:Tool_Circle_3Points.gif]]  [[Circle through Three Points Tool|Circle through Three Points]] tools.}}
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{{Note|1=See also [[Image:Tool_Compasses.gif]] [[Compass Tool|Compass]], [[Image:Tool_Circle_Center_Point.gif]] [[Circle with Center through Point Tool|Circle with Center through Point]], [[Image:Tool_Circle_Center_Radius.gif]] [[Circle with Center and Radius Tool|Circle with Center and Radius]], and  [[Image:Tool_Circle_3Points.gif]]  [[Circle through 3 Points Tool|Circle through 3 Points]] tools.}}
  
 
{{betamanual|version=5.0|{{Note|1=From GeoGebra 5, this command will work in 3D with 3D points as well.}}
 
{{betamanual|version=5.0|{{Note|1=From GeoGebra 5, this command will work in 3D with 3D points as well.}}
 
}}
 
}}

Revision as of 00:05, 27 November 2013



Circle[ <Point>, <Radius Number> ]
Yields a circle with given center and radius.
Circle[ <Point>, <Segment> ]
Yields a circle with given center and radius equal to the length of the given segment.
Circle[ <Point>, <Point> ]
Yields a circle with given center through a given point.
Circle[ <Point>, <Point>, <Point> ]
Yields a circle through the three given points (if they do not lie on the same line).

Comments

Tips[edit]

Use circles to fix the distance between two objects[edit]

Circles are a great way to make the distance between two objects constant: If there are two points A and B on two lines g (point A) and h (point B) where A can be moved and B should have the constant distance r to A you can define B as the intersection between the line h and the circle around A with the radius r. As a circle intersects a line at two points (in case it's not tangetial or passing by) you have to hide & ignore the second intersection.

An illustration of the described technique to fix the distance between two points A and B1
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