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Math Help - How To prove that points define a right triangle?

  1. #1
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    How To prove that points define a right triangle?

    for p1 = (3,0,3) p2 = (1,0,1) p3 = (1,2,3) not the same points given to me. how can i show that these points define the triangle specified?
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  2. #2
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    If the right angle occurs at P then the dot product of the vectors formed by the two sides sharing the point P will equal 0.
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  3. #3
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    ok so for these points: (4,0,4) (2,-1,8) (1,2,3) when i performed the dot product, none equal zero. is this correct?
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  4. #4
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    You have to perform the dot product on the vectors that form the sides, not the points.
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  5. #5
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    Quote Originally Posted by icemanfan View Post
    You have to perform the dot product on the vectors that form the sides, not the points.
    ahh ok i got it, the difference from each of the points to each other.
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