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# Geometry For Dummies, 3rd Edition

ISBN: 978-1-119-18155-2
Paperback
416 pages
July 2016
US \$19.99
Other Available Formats: E-book

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Introduction 1

Part 1: Getting Started with Geometry Basics 5

CHAPTER 1: Introducing Geometry 7

CHAPTER 2: Building Your Geometric Foundation 17

CHAPTER 3: Sizing Up Segments and Analyzing Angles 31

Part 2: Introducing Proofs 43

CHAPTER 4: Prelude to Proofs 45

CHAPTER 5: Your Starter Kit of Easy Theorems and Short Proofs 55

CHAPTER 6: The Ultimate Guide to Tackling a Longer Proof 75

Part 3: Triangles: Polygons of the Three-Sided Variety 87

CHAPTER 7: Grasping Triangle Fundamentals 89

CHAPTER 8: Regarding Right Triangles 107

CHAPTER 9: Completing Congruent Triangle Proofs 125

Part 4: Polygons of the Four-or-More-Sided Variety 153

CHAPTER 10: The Seven Wonders of the Quadrilateral World 155

CHAPTER 11: Proving That You Have a Particular Quadrilateral 177

CHAPTER 12: Polygon Formulas: Area, Angles, and Diagonals 193

CHAPTER 13: Similarity: Same Shape, Different Size 211

Part 5: Working with Not-So-Vicious Circles 235

CHAPTER 14: Coming Around to Circle Basics 237

CHAPTER 15: Circle Formulas and Theorems 255

Part 6: Going Deep with 3-D Geometry 277

CHAPTER 16: 3-D Space: Proofs in a Higher Plane of Existence 279

CHAPTER 17: Getting a Grip on Solid Geometry 287

Part 7: Placement, Points, and Pictures: Alternative Geometry Topics 303

CHAPTER 18: Coordinate Geometry 305

CHAPTER 19: Changing the Scene with Geometric Transformations 323

CHAPTER 20: Locating Loci and Constructing Constructions 343

Part 8: The Part of Tens 361

CHAPTER 21: Ten Things to Use as Reasons in Geometry Proofs 363

CHAPTER 22: Ten Cool Geometry Problems 369

Index 377

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