And this kind of proof is the kind of proof that you need to learn when you're learning mathematics in order to get an idea of what it means before you look into the, literally, 1,200 or 1,500 proofs of Pythagoras' theorem that have been discovered.
这样的证明就是你在学习数学的时候 应该学习的证明的方式 就是首先弄明白原理的实质 而不是首先去看前人得出的 那1500多个证明的思路