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Unformatted text preview: 1.31 ) can be proved in two ways: Theorem 1.4.4. In any parallelogram, the sum of the squares of the diagonals equals the sum of the squares of the (four) sides. O Q P R v w Figure 1.31: Theorem 1.4.4 (a) Prove Theorem 1.4.4 using the Law of Cosines ( 1.2 , Exercise 13 ). (b) Prove Theorem 1.4.4 using vectors, as follows:...
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This note was uploaded on 10/20/2011 for the course MAC 2311 taught by Professor All during the Fall '08 term at University of Florida.
 Fall '08
 ALL
 Calculus, Vectors, Dot Product

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