Difference between revisions of "Circle Command"

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<noinclude>{{Manual Page|version=4.2}}</noinclude>
 
<noinclude>{{Manual Page|version=4.2}}</noinclude>
 
{{command|conic}}
 
{{command|conic}}
;Circle[ <Point M>, <Number r> ]:Yields a circle with center ''M'' and radius ''r''.
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;Circle[ <Point>, <Radius Number> ]:Yields a circle with given center and radius.
;Circle[ <Point M>, <Segment> ]:Yields a circle with center ''M'' and radius equal to the length of the given segment.
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;Circle[ <Point>, <Segment> ]:Yields a circle with given center and radius equal to the length of the given segment.
;Circle[ <Point M>, <Point A> ]:Yields a circle with center ''M'' through point ''A''.
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;Circle[ <Point>, <Point> ]:Yields a circle with given center through a given point.
;Circle[ <Point A>, <Point B>, <Point C> ]:Yields a circle through the given points ''A'', ''B'' and ''C''.
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;Circle[ <Point>, <Point>, <Point> ]:Yields a circle through the three given points (if they do not lie on one line).
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{{Note|1=See also [[Compass Tool|Compass]],  [[Circle with Center through Point Tool|Circle with Center through Point]],  [[Circle with Center and Radius Tool|Circle with Center and Radius]], and [[Circle through Three Points Tool|Circle through Three Points]] tools.}}
  
:{{Note|1=See also [[Compass Tool|Compass]],  [[Circle with Center through Point Tool|Circle with Center through Point]],  [[Circle with Center and Radius Tool|Circle with Center and Radius]], and  [[Circle through Three Points Tool|Circle through Three 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 10:54, 26 April 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 one 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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