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Homework Help: Am I supposed to be thinking of the Pythagorean Theorem?

  1. Aug 28, 2006 #1
    I can't seem to understand this problem. Could someone give me a hint as to what I'm supposed to be thinking?

    Vectors A, B and C satisfy the vecotr equation A + B = C, and their magnitudes are related by the scalar equation A^2 + B^2 = C^2. How is vector A oriented with respect to vector B? Account for your answer.

    Am I supposed to be thinking of the Pythagoream Theorum..?
  2. jcsd
  3. Aug 28, 2006 #2
    Yep, that's right.
  4. Aug 28, 2006 #3


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    Staff Emeritus
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    You can use dot products too. In fact, I would advise trying sometime to do this problem strictly algebraically (i.e. no invoking your geometric knowledge!) just so you can get practice with your algebraic skills!
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