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Love Triangle: How Trigonometry Shapes the World

by (Riverhead Books)

(161 reviews)

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AN INSTANT NEW YORK TIMES BESTSELLER!

An ode to triangles, the shape that makes our lives possible

Trigonometry is perhaps the most essential concept humans have ever devised. The simple yet versatile triangle allows us to record music, map the world, launch rockets into space, and be slightly less bad at pool. Triangles underpin our day-to-day lives and civilization as we know it.

In Love Triangle, Matt Parker argues we should all show a lot more love for triangles, along with all the useful trigonometry and geometry they enable. To prove his point, he uses triangles to create his own digital avatar, survive a harrowing motorcycle ride, cut a sandwich, fall in love, measure tall buildings in a few awkward bounds, and make some unusual art. Along the way, he tells extraordinary and entertaining stories of the mathematicians, engineers, and philosophers -- starting with Pythagoras -- who dared to take triangles seriously.

This is the guide you should have had in high school -- a lively and definitive answer to "Why do I need to learn about trigonometry?" Parker reveals triangles as the hidden pattern beneath the surface of the contemporary world. Like love, triangles actually are all around. And in the air. And they're all you need.

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  • We started tracking this book on May 1, 2024.
  • This book was $15.99 when we started tracking it.
  • The price of this book has changed 3 times in the past 459 days.
  • The current price of this book is $14.99 last checked one day ago.
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  • This lowest price this book has been offered at in the past year is $2.99.
  • The lowest price to date was $2.99 last reached on April 15, 2025.
  • This book has been $2.99 one time since we started tracking it.
  • The highest price to date was $15.99 last reached on April 23, 2025.
  • This book has been $15.99 2 times since we started tracking it.

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Additional Info

  • Publication Date: August 20, 2024
  • Text-to-Speech: Disabled
  • Lending: Disabled
  • Print Length: 345 Pages
  • File Size: 817 KB

We last verified the price of this book about one day ago. At that time, the price was $14.99. This price is subject to change. The price displayed on the Amazon.com website at the time of purchase is the price you will pay for this book. Please confirm the price before making any purchases.