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anonymous

  • one year ago

MEDAL + FAN!! In the figure below, segment DE is parallel to segment BC and segment EF is parallel to AB: Which statement can be proved true using the given theorem? A. Segment BF = 9 B. Segment BD = 18 C. Segment BD = 20 D. Segment BF = 24

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    What do you think it is?

  3. anonymous
    • one year ago
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    @dan815 @mathmate

  4. anonymous
    • one year ago
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    18

  5. mathmate
    • one year ago
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    Is the "given theorem" the intercept theorem (or Thales theorem)? Hint: the following link will lead you to the solution: http://planetmath.org/intercepttheorem

  6. anonymous
    • one year ago
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    thanks

  7. mathmate
    • one year ago
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    you're welcome! :)

  8. anonymous
    • one year ago
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    I dont get it :/

  9. mathmate
    • one year ago
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    Sorry, the above link did not seem to work. This is the correct one: http://math.stackexchange.com/questions/92929/similar-triangle-theorem-in-the-incommensurable-case I'll give you an example: |dw:1441308807586:dw| The intercept theorem says AD/DB = AE/EC Substituting AD=5, AE=4, EC=3, we have 5/x=4/3 cross multiply to get 15=4x solving gives x=15/4.

  10. anonymous
    • one year ago
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    ok thanks!

  11. mathmate
    • one year ago
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    You're welcome! :)

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