CHAPTER 9 The Pythagorean Theorem
measures 90° and the quadrilateral is a square. If it is a square with side length c, then its area is c2.So,a2 b2 c2, which proves the Pythagorean Theorem. ba b a a b b a c c c c The Pythagorean Theorem In a right triangle, the sum of the squares of the lengths of the legs equals the square of the length of the hypotenuse. Ifa and b are the ...
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