Love Triangle

Love Triangle

The Life-changing Magic of Trigonometry


Brought to you by Penguin.

Why do mobile phones work when you're on a train? What happens when you pull a pop song apart into pure sine waves and play it back on a piano? And what did mathematicians have to do with the great pig stampede of 2012? The answer to each of these questions can be found in the triangle.

Humans have been using triangles for thousands of years to build structures, measure the earth, make music, paint vanishing points, pot snooker balls and much, much more. But trigonometry is not a thing of the past - triangles underpin all of modern data technology. When someone Snapchats a photo, the light travels into the camera as electromagnetic sine waves, Fourier analysis compresses the image and then trigonometry is used to send the data to someone else's phone; when you listen to a track on Spotify, triangles remove the sounds which a human ear can't perceive and reassemble the song so that it's small enough to stream. Triangles are the hidden pattern beneath the surface of the contemporary world.

Join Matt Parker, stand-up comedian and author of the first ever maths book to be a No. 1 bestseller, as he uncovers the secrets of trigonometry and shares extraordinary stories about the mathematicians, philosophers and engineers who dared to take triangles seriously.

© Matt Parker 2024 (P) Penguin Audio 2024


  • Move over Euclid. It’s Parker Time. Love Triangle is a blissful blend of pure science and pure merriment. Edifying, entertaining, excellent!
    Alex James

About the author

Matt Parker

Originally a maths teacher from Australia, Matt Parker is now a stand-up comedian and a YouTuber with over one hundred million views. He is the author of the #1 bestseller Humble Pi and Things to Make and Do in the Fourth
Dimension. Matt is also frequently seen, heard, and read on the Discovery Channel, on BBC radio, and in The Guardian, in that order. He has previously held world records for both the Rubik's Cube and Space Invaders. In the pursuit of maths, Matt has: flipped a coin 10,000 times, travelled to Antarctica, memorized p to hundreds of digits, and been bitten by a bullet ant in the Amazon rainforest. Matt has given maths lectures at Cambridge University, Oxford University, Harvard University and Lake Monger Primary School.
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