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la

Can u please help me with #38 I HAVE TRIED SO HARD ON IT and still cant get the answer please help:)? http://cbuddman.files.wordpress.com/2009/08/final-review-part-2.pdf

  • one year ago
  • one year ago

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  1. Kuoministers
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    first you would need to find the area of the rectangle. Then you would find the area of the triangle with the formula A = 1/2 B H. To find the height you would need to sin rule.

    • one year ago
  2. la
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    help please:)

    • one year ago
  3. Kuoministers
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    have you learnt of special triangles?

    • one year ago
  4. la
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    30 60 90...45 45 90..i learned them

    • one year ago
  5. Kuoministers
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    if you used the sin rule the length opposite 60 is \[\sqrt{48}\]

    • one year ago
  6. Kuoministers
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    they want the area of this question right?

    • one year ago
  7. la
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    yes

    • one year ago
  8. Kuoministers
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    if you used the sin rule again you would find the bottom length to be equal to 4.

    • one year ago
  9. Kuoministers
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    so the area of the triangle is equal to 8 root 3. \[8\sqrt{3}\]

    • one year ago
  10. la
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    HOW U GET THAT?

    • one year ago
  11. Kuoministers
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    ok.. the area of the traingle is 1/2 b h right? 1/2 * 4 * \[\sqrt{48}\] I have gotten this by using right angle trig? sin cos tan?

    • one year ago
  12. Kuoministers
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    1/2 * 4 * \[\sqrt{48}\] = \[\sqrt{192}\] which is simplified to be\[8\sqrt{3}\]

    • one year ago
  13. la
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    so now i know that whats next?

    • one year ago
  14. Kuoministers
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    well i got the area of the triangle so all you need now is area of rectangle and add them together

    • one year ago
  15. Kuoministers
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    and sorry this has nothing to do with special triangles

    • one year ago
  16. Kuoministers
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    ill complete it for you... (hope you can understand this) the bottom of the rectangle is equal to 6 ( 10-4) the length is \[\sqrt{48}\] so its \[\sqrt{48}\] * 6 which is \[24\sqrt{3}\] so now we add these area together which is \[32\sqrt{3}\]

    • one year ago
  17. Kuoministers
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    do you understand it if you dont ill explain it again :)

    • one year ago
  18. la
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    i thought the bottom rectangle was 4?

    • one year ago
  19. Kuoministers
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    It says on the diagram the whole length which is the triangle and rectangle is equal to 10. The bottom of the triangle is 4. So the rectangle is 10-4. which is 6

    • one year ago
  20. la
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    oh okay! THANK U SO MUCH!:)

    • one year ago
  21. Kuoministers
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    :)

    • one year ago
  22. Kuoministers
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    if you dont mind giving me a medal :) please do

    • one year ago
  23. la
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    HOW CAN I DO THAT?

    • one year ago
  24. Kuoministers
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    click best response lol

    • one year ago
  25. Kuoministers
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    • one year ago
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  26. la
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    OH lol ok i will wait hold up wat do i add to get 32√3 lol

    • one year ago
  27. Kuoministers
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    well the area of the triangle and area of rectangle which is 24 root 3 + 8 root 3

    • one year ago
  28. la
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    okay thank u!! so much:)

    • one year ago
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