Explore the lifechanging magic of trigonometry with Matt Parker standup mathematician and No. 1 bestselling author of Humble PiWhy can no two people ever see the same rainbow What happens when you pull a pop song apart into pure sine waves and play it back on a piano Why does the wake behind a duck always form an angle of exactly 39 degrees 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.In Love Triangle standup comedian exmaths teacher and Sunday Times number one bestselling author Matt Parker is on a mission to prove why we should all show a lot more love for triangles along with the useful trigonometry and geometry they enable. To make his point he uses triangles to create his own digital avatar survive a harrowing motorcycle ride cut a sandwich into three equal parts and measure tall buildings while wearing silly shoes.