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Math Help - Proofs

  1. #1
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    Proofs

    Proofs-screen-shot-2013-12-16-10.17.41-pm.jpg

    I have no idea how to do this.
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  2. #2
    MHF Contributor ebaines's Avatar
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    Re: Proofs

    Start by showing that triangle ABC is simuilar to both triangle ADE and triangle BEF, hence ADE is similar to BEF. This means that AD/EF = DE/BF. Finally since EF=DC, and DE=CF, you're there.
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  3. #3
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    Re: Proofs

    Quote Originally Posted by ebaines View Post
    Start by showing that triangle ABC is simuilar to both triangle ADE and triangle BEF, hence ADE is similar to BEF. This means that AD/EF = DE/BF. Finally since EF=DC, and DE=CF, you're there.
    Ebaines is right you will get your answer.
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  4. #4
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    Re: Proofs

    I do not understand how to fill out the chart. Can you help me with this? The text book does not explain it very well.
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  5. #5
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    Re: Proofs

    Quote Originally Posted by Fentonjc View Post
    I do not understand how to fill out the chart. Can you help me with this? The text book does not explain it very well.
    It should be like this

    Statements Reason
    Angle ADE=EFB=90 Degree Right Angle
    Angle DAE=FEB Corresponding Angles

    Hence ADE is similar to BEF By AA

    AD/EF=AE/EB=DE/FB AS ADE is similar to BEF

    AD/DC=CF/FB EF=DC and DE=CF
    Hence Proved
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