How Would YOU Solve This Geometry Puzzle?

In this math video I (Susanne) explain how to find the red area. We use the formula for a quarter circle and sectors. The cosine helps us to find the missing angle and the Pythagorean Theorem gives us the length of the missing side. Mathematics explained. 00:00 Intro – Geometry Problem 0:51 How to Solve this 2:40 Area A1 4:29 Area A2 10:38 Area A3 14:00 See you later! My German Math Channel: ​⁠ ‪@MathemaTrick‬ Find me on Instagram:   / mathema_trick   Buy Me a Cup of Hot Chocolate? ☕🍫 Creating these math tutorials takes a lot of brainpower and a warm cup of hot chocolate always helps! If you'd like to support my work and keep the tutorials coming, consider treating me to a virtual cup. 👉 https://paypal.me/TheMathQueen Thank you so much for your kindness! It means the world to me! #geometry #maths #mathematics