The philosopher Schopenhauer has described this proof as a "brilliant piece of perversity" Schopenhauer 1977; Gardner 1984, p.
So let's do another one right over here.
And 3 squared is the same thing as 3 times 3.
Choose a variable to represent it.
Specifically, if you square the lengths of the two legs and add the resulting numbers together, that number will always equal the square of the length of the hypotenuse.
Let me tell you what the Pythagorean theorem is.
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Writing the formula in every exercise and saying it aloud as you write it, may help you remember the Pythagorean Theorem.