Pythagorean theorem and its cause I'm in high school, and one of my problems with geometry is the P

Ryan Robertson

Ryan Robertson

Answered question

2022-07-11

Pythagorean theorem and its cause
I'm in high school, and one of my problems with geometry is the Pythagorean theorem. I'm very curious, and everything I learn, I ask "but why?". I've reached a point where I understand what the Pythagorean theorem is, and I understand the equation, but I can't understand why it is that way. Like many things in math, I came to the conclusion that it is that way because it is; math is the laws of the universe, and it may reach a point where the "why" answers itself. So what I want to know is, is there an explication to why the addition of the squared lengths of the smaller sides is equal to the squared hypotenuse, or is it just a characteristic of the right triangle itself? And is math the answer to itself?
Thank you.

Answer & Explanation

earendil666h1

earendil666h1

Beginner2022-07-12Added 10 answers

It is so because one can prove it. Several proofs can be found e.g. on Wikipedia. Of course one has to "believe" the axioms on which the proofs are based, so if you don't feel compelled to ackknowledge that e.g. "for every line in the plane and every point not on that line there exists one and only one line though this point that does not intersect the first line", the proofs won't work for you (but then also the statement itself may be wrong).

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