Geometer's Sketchpad and GeoGebra Prepared Sketches and Scripts
The real danger is not that computers will begin to think like men, but that men will begin to think like computers.
—Sydney J. Harris, Return to Mathematical Circles (1988)

This page contains Geometer's Sketchpad 4.0  and GeoGebra programs and scripts created by Timothy Peil for use in the corresponding chapters. Other Sketchpad 4.0 programs and scripts created by others are listed at the bottom of this page.

The left-hand figure illustrates the location of the custom tools for the Poincare Half-plane in the prepared Geometer's Sketchpad sketch. To open the context menu press and hold the pointer on the Custom Tool icon, which is the arrow followed by the three vertical dots. And then select the desired tool. The custom tools work the same as the standard tools.

The right-hand figure illustrates the location of the custom tools for the Poincare Half-plane in the prepared GeoGebra sketch. To open the context menu click on the custom tool icon, in this case, the icon says Poincare Half-Plane. 

Chapter Two - Euclidean and Non-Euclidean Geometry

	Missing-Strip Plane     Missing-Strip Plane
	Poincare Half-plane    Poincare Half-plane
	Rulers for Euclidean, Taxicab, and Max-distance Planes (Script written by Jessica Mavis.) After opening, note the page tabs at the bottom for each ruler.

Chapter Three - Transformational Geometry

	Animations for translations, rotations, reflections, dilations, shears, and strains.  After opening, note the page tabs at the bottom for each type of transformation.  Animations for translations, rotations, reflections, dilations, shears, and strains
	Rotate Equilateral Triangle inside a Square
	Symmetries of a Triangle  After opening, note the page tabs at the bottom for rotations and for all symmetries. Symmetries of a Triangle

Chapter Four - Projective Geometry

Investigation Alternate Construction of a Projectivity   Investigation Alternate Construction of a Projectivity

Other Sketchpad Prepared Sketches and Scripts Created by Others

Whistler Ally Mathematics Geometer's Sketchpad script and tools http://whistleralley.com/math.htm