GeoGebra html5 and JavaSketchpad Glossary of Sketches
Matheamtics is not a deductive science – that's a cliché. When you try to prove a theorem, you don't just list the hypotheses, and then start to reason. What you do is trial and error, experimentation, guess-work.
—Paul Halmos (1916–2006)

This page contain is a glossary of all the GeoGebra htm5 and JavaSketchpad interactive sketches used in the book. For some of the sketches, you may want to refer to the sections discussion or exercises.

Chapter Two - Euclidean and Non-Euclidean Geometry

• Exercise 2.1. All triangles are isosceles. (Find error in proof.) GeoGebra or JavaSketchpad
• Exercise 2.2. Rusty Compass Construction/Compass Equivalence Theorem. (Find error in proof.) GeoGebra or JavaSketchpad
• 2.1 Lines in the Poincaré Half-plane and Missing Strip Plane. GeoGebra Poincare, GeoGebra Missing Strip, or JavaSketchpad.
• 2.1 Poincaré Half-plane Angle Measure GeoGebra or JavaSketchpad

Chapter Three - Transformational Geometry

• 3.1 Tesselation  GeoGebra or JavaSketchpad
• 3.1 Transformations - Translation, Rotation, Reflection, etc. GeoGebra or JavaSketchpad
• 3.4 Investigation Translations and Rotation  GeoGebra or JavaSketchpad
• 3.5 Investigation Reflection and Glide Reflection  GeoGebra or JavaSketchpad
• 3.5 Isometry a composition of at most three reflections  GeoGebra or JavaSketchpad
• 3.6 Investigation Dilation  GeoGebra or JavaSketchpad

Chapter Four - Plane Projective Geometry

• 4.1 Animation One-Point Perspective  GeoGebra or JavaSketchpad
• 4.1 Animation Two-Point Perspective  GeoGebra or JavaSketchpad
• 4.1 Perspective view through a pin hole  GeoGebra or JavaSketchpad
• 4.1 Views from different perspectives of a square  GeoGebra or JavaSketchpad
• 4.2 Definition of a complete quadrangle  GeoGebra or JavaSketchpad
• 4.2 Perspective from a point and perspective from a line  GeoGebra or JavaSketchpad
• 4.2 Perspectivity and projectivity  GeoGebra or JavaSketchpad
• 4.3 Definition of a complete quadrilateral  GeoGebra or JavaSketchpad
• 4.3 - 4.4 Desargues' Theorem  GeoGebra or JavaSketchpad
• 4.5 Quadrangle and Harmonic Set  GeoGebra or JavaSketchpad
• 4.5 Construct a Harmonic Conjugate  GeoGebra or JavaSketchpad
• 4.5 Harmonic Sets  GeoGebra or JavaSketchpad
• 4.5 Harmonic Sets and Music  GeoGebra or JavaSketchpad
• 4.6 Perspectivity GeoGebra or JavaSketchpad
• 4.6 Projectivities  GeoGebra or JavaSketchpad
• 4.6 Uniqueness of a Projectivity GeoGebra or JavaSketchpad
• 4.6 Cross joins - Alternate construction of a projectivity GeoGebra or JavaSketchpad
• 4.7 Point Conic and Line Conic  GeoGebra or JavaSketchpad
• 4.7 Definition of a Hexagon  GeoGebra or JavaSketchpad
• 4.7 Diagonal Points of a Hexagon  GeoGebra or JavaSketchpad
• 4.7 Pascal's Theorem  GeoGebra or JavaSketchpad
• 4.7 Tangent Lines and Point Conics GeoGebra or JavaSketchpad