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Math Help - Help with Solving Geometry Proof

  1. #1
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    Help with Solving Geometry Proof



    PQ=QR ProvePR=QS ◄--------P-------Q----R--------S--------►

    Statements Reasons
    PQ=RS Given
    Q is between PR midpoint
    R is between QS midpoint
    PQ=QR
    QR=RS
    PQ+QR=QR+RS Segment Addition Postulate (Postulate 1.13)
    PR=PQ+QR and QS=QR+QS Segment Addition Postulate (Postulate 1.13)
    PR=QS Substitution Law (Postulate 1.11)



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  2. #2
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    Re: Help with Solving Geometry Proof

    Am I missing something? It looks like all you need to do is fill in the two blanks in the second column, and you're actually given that Q is the midpoint of PR and R is the midpoint of QS. That seems to be what the word "midpoint" in the second column (lines two and three) means. If so, what's the definition of midpoint?
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  3. #3
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    Re: Help with Solving Geometry Proof

    Am I missing something? It looks like all you need to do is fill in the two blanks in the second column, and you're actually given that Q is the midpoint of PR and R is the midpoint of QS. That seems to be what the word "midpoint" in the second column (lines two and three) means. If so, what's the definition of midpoint?

    Sorry, I posted this twice by some mistake, I don't know how to delete the second post.
    Last edited by zhandele; March 12th 2013 at 08:10 PM.
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  4. #4
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    Re: Help with Solving Geometry Proof

    Thank You,

    I just wanted to make sure that I was working in the correct direction. I am sure this geometry stuff is real easy for all of you that reply to these posts, but it's been 29 years since I was in a math class and am trying to do this online. I appreciate the help.

    Sandy
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