Web-School

The most satisfying proof that all triangles equal 180° 😍✨

Why do the angles of EVERY triangle equal exactly 180°? 📐 We've all memorized this math fact, but rarely do we get to see why it’s true. Watch this oddly satisfying geometric animation where we fold the vertex angles of the triangle in 1000178129.jpg down to the base line. Look carefully at how the Black, Green, and Red angles perfectly form a perfect straight angle (a semicircle)! Math is beautiful when you visualize it. Share this with someone who hates geometry! 🏆