【天才求む】発想力のある人しか解けない灘中の図形問題【面白い算数】

Manabi Square's book, "A Book Anyone Can Solve in Just One Day for Kaisei and Nada Junior High School Math Entrance Exams" → https://amzn.asia/d/4kUl4x2 [Difficulty: ★★★☆☆] This is a question from the 2000 Nada Junior High School entrance exam. ▼Key Solution Points 1. You'll notice that cutting a certain part with a straight line creates a symmetrical figure. Draw a line there. 2. This is where you'll need to be aware. You should start to see similar triangles. 3. Once you've found congruent triangles, you'll need to think about common areas. Once you've gotten this far, you should be able to transform the desired part into a beautiful shape using equal-area transformations. This was a puzzle-like problem packed with many elements. Each element is difficult in itself, so it really impresses me, as expected from Nada Junior High School. It's a good question. ▼Manavi Square's social media accounts are listed here. Website https://manavigate.co.jp/ Twitter   / manavisquare   Yuta Sugato's Twitter   / mrkeiosfc16no1   ▼Please feel free to contact us! [email protected]