Head First 2D Geometry

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table of contents

Table of Contents (Summary)

Intro xvii

1 Finding missing angles: Reading between the lines 1

2 Similarity and congruence: Shrink to fit 49

3 The Pythagorean Theorem: All the right angles 103

4 Triangle properties: Between a rock show and a triangular place 149

5 Circles: Going round and round 205

6 Quadrilaterals: It’s hip to be square 235

7 Regular polygons: It’s all shaping up 273

Table of Contents (the real thing)

Your brain on Geometry. Here you are trying to learn something,

while here your brain is doing you a favor by making sure the learning doesn’t

stick. Your brain’s thinking, “Better leave room for more important things, like

which wild animals to avoid and whether naked snowboarding is a bad idea.”

So, how do you trick your brain into thinking that your life depends on knowing

about triangles and circles and the Pythagorean Theorem?

Intro

Who is this book for? xviii

We know what you’re thinking xix

Metacognition: thinking about thinking xxi

Here’s what YOU can do to bend your brain into submission xxiii

Read me xxiv

The technical review team xxvi

Acknowledgments xxvii

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table of contents

Reading between the lines

1

Ever get the feeling there’s something they’re not

telling you?

If you want to master the real world, you need to get geometry. It’s a set of

tools for ...