Difference between revisions of "Circle Command"

From GeoGebra Manual
Jump to: navigation, search
Line 8: Line 8:
 
{{Note| 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| 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|
 
{{betamanual|version=5.0|
{{Note|1=From GeoGebra 5, this command will work with 3D objects as well}}
+
{{Note|1=From GeoGebra 5, this command will work in 3D with 3D Points as well}}
 
}}
 
}}

Revision as of 19:39, 8 June 2012


Circle[Point M, Number r]
Yields a circle with center M and radius r.
Circle[Point M, Segment]
Yields a circle with center M and radius equal to the length of the given segment.
Circle[Point M, Point A]
Yields a circle with center M through point A.
Circle[Point A, Point B, Point C]
Yields a circle through the given points A, B and C.

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
© 2022 International GeoGebra Institute