Love Triangle: How Trigonometry Shapes the World

Love Triangle by Matt Parker—an instant New York Times bestseller—is a lively, hilarious, and enlightening ode to triangles, the shape that makes modern life possible. Parker reveals how trigonometry underpins everything from music recording and world mapping to rocket launches, architecture, and even playing pool. Through entertaining stories and real-world adventures—creating a digital avatar, surviving a motorcycle ride, cutting the perfect sandwich, measuring skyscrapers, and making triangle-inspired art—he showcases why triangles and the math behind them deserve far more appreciation. Blending humor, history, and practical insights, Parker introduces the mathematicians and thinkers from Pythagoras onward who helped uncover the power of triangles. This is the high school math guide you wish you had: a fun, definitive answer to “Why do I need trigonometry?” showing that triangles truly are all around us—and all we need.