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Math Help - Parallogram Area Don't Have Height Need within few hours

  1. #1
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    Parallogram Area Don't Have Height Need within few hours

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  2. #2
    dan
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    can you give me the values that you have...i could not read you picture
    dan
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  3. #3
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    BE=CD-37cm
    BF=26cm
    FC=14cm
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    Let EH represent the perpendicular line drawn from E to BC, i.e. the height. Now,
    \Delta EHC\sim \Delta OFC
    But, OF=\frac{1}{2}EH (half the height).
    Thus,
    \frac{OF}{EH}=\frac{1}{2}.
    Now use similar triangles,
    \frac{OF}{EH}=\frac{FC}{CH}
    Thus,
    \frac{FC}{CH}=\frac{1}{2}
    Thus,
    FC=\frac{1}{2}CH
    Thus,
    CH=2FC
    Thus,
    CH=2(14)=28
    Then,
    HF=CH-FC=14
    Then,
    BH+HF=26
    Thus,
    BH+14=26
    Thus,
    BH=12
    Finally Pythagorean theorem,
    BH^2+HE^2=BE^2
    Thus,
    (12)^2+HE^2=(37)^2
    Thus,
    144+HE^2=1369
    Thus,
    HE^2=1225
    Thus,
    HE=\sqrt{1225}=35
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    tyvm this site pwns
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    Forum Admin topsquark's Avatar
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    Quote Originally Posted by AHDDM
    tyvm this site pwns
    Yes, I am old. Can you say that again in English?

    -Dan
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    Quote Originally Posted by topsquark
    Yes, I am old. Can you say that again in English?
    You are only 36, extremely young age for a physisit.
    ---
    Thank you very much. This site pwns.

    Pwns stands for Pawns, as in wins/awesome.
    Example,
    "ThePerfectHacker pawned the n00bish team with cheats in Battlefield 2"
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    Forum Admin topsquark's Avatar
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    Quote Originally Posted by ThePerfectHacker
    You are only 36, extremely young age for a physisit.
    ---
    Thank you very much. This site pwns.

    Pwns stands for Pawns, as in wins/awesome.
    Example,
    "ThePerfectHacker pawned the n00bish team with cheats in Battlefield 2"
    Oookay, I'll have to look that one up in my chess-book.

    Just for reference, "tyvm" is "thank you very much?" (Do you know I can actually type out the words in that faster than I can type tyvm?)

    -Dan
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  9. #9
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    Quote Originally Posted by topsquark
    Oookay, I'll have to look that one up in my chess-book.

    Just for reference, "tyvm" is "thank you very much?" (Do you know I can actually type out the words in that faster than I can type tyvm?)

    -Dan
    The sad thing is that some of us can now type it in T_EX faster than it
    takes to decipher the abreviation.

    RonL
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