GeoGebra

GeoGebra Tools

For the French version of this page, see Outils

GeoGebra 3.0 introduced "user defined tools". This means you can create your own tools for the toolbar by taking an existing construction and specifying input and output objects of your new tool.

Let's start sharing our coolest GeoGebra Tools on this page!

• mosaicos10 - Herramientas para construir mosaicos con polígonos regulares o con dardos y cometas de Penrose.
  
  • Sólo teselas regulares
  • Sólo Penrose
  • Penrose con arcos de Conway
  • Ejemplo
• Giri pattern Create your own patterns using a set of five tiles, by Tommy Nedbal
• Polynomials - Two tools for quadratic and cubic (Langrange) interpolation polynomials by 3 resp. 4 points. Be patient, rather slow performance with the cubic polynomial. ;-)

• IsogonalConjugate(point,3 points of a triangle) - Create the Isogonal Conjugate of a point P with respect to a triangle ABC. See the article in Mathworld or Wikipedia or [1]for the mapping's interesting properties.

• FeuerbachCircle(A, B, C) - Create the Feuerbach Circle (nine-point-circle) of a triangle ABC including its centre, all nine points on it and the orthocentre.

• Tangents to two circles - This tool constructs lines tangent to two circles. The theory behind it is explained here.
  

• Complex numbers - Tools for Complex numbers, including multiplication, reciprocal, congugate and mobius transformation. (Addtion can be done by "A+B" etc. and so is not needed)
  

• Square Difference - Tool to display/compute the square distance between a point and a line as used by a least squares regression.

• Easy Table - Tool to create a x | f(x) table given a function, starting x value, ending x value, and step. The table will be created as a textbox. The table is limited to 99 rows (including the heading). To see a post on how the tool was created read this forum post

• function in the box - Tool to create a 'boxed' view of a function. The given function is (mathematically) clipped to a given rectangle. Just specify the function and the lower left and upper right vertices of the rectangle.
  

• Triangle Tools - This is a useful tool in part translated from French. It has been added to and it includes basic tools for triangles including finding the orthocentre, centre of gravity, incentre and circumcentre. It will also construct medians, inscribed and circumscribed circles

• Altitude Tool - For drawing an altitude in a triangle.
  

• Tetris Tools - Polygons used in the game Tetris. By David Travis.
  

Contents 1 Splines 2 Conic sections 3 Taxicab Geometry 4 Vector Tools

Splines

• Bezier Curves - two tools for quadratic and cubic Bezier curves
• Hermite spline - a tool to create Hermite splines
• Catmull-Rom spline - a tool to create Catmull-Rom splines

Conic sections

• Ellipse from segment and point on segment by Michael Horvath
• Hyperbola from segment and point on segment by Michael Horvath
• Parabola from vertex and focus by Michael Horvath
• Parabola(Vertex,Point) - Create a quadratic function out of vertex and another point on the parabola

Taxicab Geometry

• Taxicab Distance doesn't appear on the toolbar but is required by the other Taxicab tools below
• Taxicab Circle from Center and point on circle
• Taxicab Ellipse from foci and point on ellipse
• Taxicab Toolbox contains the tools above in a GeoGebra worksheet

Vector Tools

• Texttool that shows the correct name and the coordinates in the right matter for a vector that is defined by two points.