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nanaheads

In the figure, ΔABC ~ ΔDEF. Solve for x.

  • one year ago
  • one year ago

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  1. nanaheads
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    • one year ago
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  2. Grazes
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    Make a proportion based on the fact that they are similar. Turn the bottom triangle until the triangles match and compare the sides. The proportion should be 16/8=x/3

    • one year ago
  3. huneya
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    do cross multiplication

    • one year ago
  4. nanaheads
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    So the answer should be b=4?

    • one year ago
  5. Grazes
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    |dw:1343161960665:dw| Try again.

    • one year ago
  6. huneya
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    16x 3 /8

    • one year ago
  7. Grazes
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    Nana. Did you check your work?

    • one year ago
  8. nanaheads
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    So it's 6?

    • one year ago
  9. huneya
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    yes

    • one year ago
  10. nanaheads
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    Thank you so much! Can you help me with another one?

    • one year ago
  11. Grazes
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    Good job. Give yourself a pat. Do you understand how I made the proportion, though?

    • one year ago
  12. nanaheads
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    Yes I did!

    • one year ago
  13. nanaheads
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    • one year ago
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  14. Grazes
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    Try to make a proportion yourself after matching up the triangles. I'll tell you whether you got it right or not ;)

    • one year ago
  15. huneya
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    x-3/4 = 12/3

    • one year ago
  16. Grazes
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    Huneya. Please try to help her without guessing for her :/ At any rate, huneya's attempt was wrong.

    • one year ago
  17. huneya
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    no its not @Grazes

    • one year ago
  18. nanaheads
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    I got 16... I think that's wrong.

    • one year ago
  19. nanaheads
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    so it's 19? I was close.

    • one year ago
  20. Grazes
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    Huneya's proportion was correct.. to a degree. It was only right because they were special similar triangles

    • one year ago
  21. Grazes
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    |dw:1343162820034:dw| That'd be the correct proportion if you needed to show your work on a test.

    • one year ago
  22. nanaheads
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    So it's 19?

    • one year ago
  23. Grazes
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    Yep.

    • one year ago
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