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harrym

I have 3 questions and I have a pretty good idea of an answer for some of them but im not 100% sure if they are right so ill see if I get the same answer: 1. If bh=42 what is de 2.If ab=36 what is jf 3.If ab=36 what is ke

  • one year ago
  • one year ago

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  1. sterna
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    Do you have a diagram to go with this question?

    • one year ago
  2. harrym
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    Yea I posted an attachment ill repost it

    • one year ago
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  3. sterna
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    thanks - didn't see it before

    • one year ago
  4. harrym
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    I think it was my fault so dont worry hahah

    • one year ago
  5. sterna
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    looks like you've got 6 congruent segments across the bottom with a total length of 42, so what do you think DE equals?

    • one year ago
  6. harrym
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    I believe de = 7 but Its important that I get it right so thats why I posted this

    • one year ago
  7. sterna
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    yep

    • one year ago
  8. sterna
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    Now for the others. You have a triangle with one side of 36 (that's AB) and another side of 42 (BH). All the other triangles as you move across from left to right are similar to the biggest triangle (ABH.) Are you with me?

    • one year ago
  9. harrym
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    Yea

    • one year ago
  10. sterna
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    Since all the triangles are similar, the proportions of their sides are the same. So 36/42, which reduces to 6/7, is a common proportion in all of the triangles. For example, triangle JFH

    • one year ago
  11. sterna
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    has a base of 14 (7*2) so to find jf, set up a proportion of 6/7=x/14 to get JF.

    • one year ago
  12. sterna
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    so JF would be?

    • one year ago
  13. harrym
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    12

    • one year ago
  14. sterna
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    good! Now do the same thing for KE. Figure the length of the base of triangle KEH and solve the proportion

    • one year ago
  15. sterna
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    you doing OK?

    • one year ago
  16. harrym
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    Yea I got 18 but im not really sure if its right

    • one year ago
  17. sterna
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    that's what I got as well: x/21=6/7. x=18 I think you've got it!

    • one year ago
  18. harrym
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    Alright well thank you so much!

    • one year ago
  19. sterna
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    my pleasure!

    • one year ago
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