Für Kinder in China ist das einfach. Auch für dich? | Fläche, Kreis

Today we're tackling a simple math problem from China. More precisely, a problem from a Chinese elementary school. What is the area marked in red? My recommendations: Hard Puzzles on Amazon: https://amzn.to/4oUqK4y * Math Movies on Amazon: https://amzn.to/3US9hfv * Math Comics & Humor on Amazon: https://amzn.to/4p1QmNe * Gigerenzer on Amazon: https://amzn.to/4mFZ5D8 * This is an advertising or affiliate link. If you click on this link and then make a purchase or sign up for something, we receive a commission. This does not result in any additional costs for you. Idea for the problem from:    • Even Adults Cannot Solve This!      • 99% adult fail this-will you?