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var ts = ["Introduction to GeoGebra","License / Copyright","Acknowledgments","How to Use this Book","Table of Contents","Installation and Introduction of GeoGebra","Activity 1: Installing GeoGebra","Activity 2: Save the Accompanying Files","Introduction: What is GeoGebra and How Does It Work?","Drawing versus Geometric Construction","Activity 3: Drawing Geometric Figures and Other Objects","Activity 4: Saving GeoGebra files","Activity 5: Drawings, Constructions, and Drag Test ","Activity 6: Rectangle Construction","Activity 7: Equilateral Triangle Construction","Practice Block I","Tips and Tricks","Activity I.a: Square Construction","Activity I.b: Regular Hexagon Construction","Activity I.c: Circumscribed Circle of a Triangle","Activity I.d: Visualize the Theorem of Thales","Basic Algebraic Input, Commands, and Functions","Tips and Tricks","Activity 8a: Constructing Tangents to a Circle (Part 1)","Activity 8b: Constructing Tangents to a Circle (Part 2)","Activity 9: Exploring Parameters of a Quadratic Polynomial","Activity 10: Using Sliders to Modify Parameters","Activity 11: Library of functions","Export of Pictures to the Clipboard","Activity 12a: Exporting Pictures to the Clipboard","Activity 12b: Inserting Pictures into a Text Processing Document","Practice block II","Tips and Tricks","Activity II.a: Parameters of a Linear Equation"," Activity II.b: Introducing Derivatives – The Slope Function","Activity II.c: Creating a ‘Function Domino’ Game","Activity II.d: Creating a ‘Geometric Figures Memory’ Game","Inserting Pictures into the Graphics Window","Activity 13: Drawing Tool for Symmetric Figures","Activity 14a: Resizing and Reflecting a Picture","Activity 14b: Distorting a Picture","Activity 14c: Exploring Properties of Reflection","Inserting Text into the Graphics Window","Activity 15: Coordinates of Reflected Points","Activity 16: Rotation of a Polygon","Practice Block III","Tips and Tricks","Activity III.a: Visualizing a System of Equations","Activity III.b: Translating Pictures","Activity III.c: Constructing a Slope Triangle"," Activity III.d: Exploring the Louvre Pyramid","Creating Static Instructional Materials","Activity 17a: Saving Pictures as Files","Activity 17b: Inserting Pictures into MS Word","Creating Dynamic Worksheets","Introduction: The GeoGebraWiki and User Forum","Activity 18a: Creating Dynamic Worksheets","Activity 18b: Enhancing Dynamic Worksheets","Activity 18c: Providing Dynamic Worksheets to Students","Practice Block IV","Tips and Tricks","Activity IV.a: Area Relations of Similar Geometric Figures","Activity IV.b: Visualizing the Angle Sum in a Triangle","Activity IV.c: Visualizing Integer Addition on the Number Line","Activity IV.d: Creating a ‘Tangram’ Puzzle"];
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