Pythagorean theorem
lastmod 2018-08-17created 2015-10-262 edits
The Pythagorean theorem (North Korean standard language, Munhwaŏ: sepyeongbang jeongri, "three-square theorem") is a fundamental theorem describing the relationship among the three sides of a right triangle. It holds on a flat solid figure, i.e., in Euclidean space, and states the following.
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In any right triangle, the area of the square whose side is the hypotenuse equals the sum of the areas of the squares whose sides are the other two sides.
This means that if the lengths of the two legs of a right triangle are known, the length of the remaining side can be calculated from them.