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luisz Group Title

what is the perimeter of triangle ABC?

  • one year ago
  • one year ago

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  1. pitankar Group Title
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    sum of the three side's length.

    • one year ago
  2. luisz Group Title
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    |dw:1347812022332:dw|

    • one year ago
  3. luisz Group Title
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    tips?

    • one year ago
  4. hartnn Group Title
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    there is a 30-60-90 triangle, u know the property of this special triangle ??

    • one year ago
  5. luisz Group Title
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    yes

    • one year ago
  6. luisz Group Title
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    but I know none of the sides

    • one year ago
  7. luisz Group Title
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    And I do not know the angles for the other triangle with sides

    • one year ago
  8. luisz Group Title
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    I could assume that triangle ABC is a 30-60-90, right?

    • one year ago
  9. luisz Group Title
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    C=30 degrees

    • one year ago
  10. luisz Group Title
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    A=60 degrees

    • one year ago
  11. luisz Group Title
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    B=90 degrees?

    • one year ago
  12. pitankar Group Title
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    calculate the length of perpendicular from A to BC using Pythagoras theorem. then use trigonometry relations to calculate AC. rest you can get...

    • one year ago
  13. hartnn Group Title
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    use pythagoras theorem to find the side...\|dw:1347812215548:dw|

    • one year ago
  14. luisz Group Title
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    ahh

    • one year ago
  15. luisz Group Title
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    good ol' pythagorean theorem

    • one year ago
  16. luisz Group Title
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    so we have a 9-12-15 right triangle

    • one year ago
  17. luisz Group Title
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    3-4-5?

    • one year ago
  18. luisz Group Title
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    so the altitude becomes 12

    • one year ago
  19. hartnn Group Title
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    now AD = 12 can u find all sides ?

    • one year ago
  20. luisz Group Title
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    30 degree side becomes 12 radical 3

    • one year ago
  21. luisz Group Title
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    AC equals 24

    • one year ago
  22. luisz Group Title
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    now

    • one year ago
  23. luisz Group Title
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    15+24=39

    • one year ago
  24. hartnn Group Title
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    use pythagoras

    • one year ago
  25. luisz Group Title
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    39+9=48

    • one year ago
  26. luisz Group Title
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    48+12 radical 3?

    • one year ago
  27. luisz Group Title
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    is that really it?

    • one year ago
  28. luisz Group Title
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    No wonder this problem was so hard

    • one year ago
  29. luisz Group Title
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    I never used pythagorean theorem

    • one year ago
  30. luisz Group Title
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    derp

    • one year ago
  31. hartnn Group Title
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    u did this by yourself :)

    • one year ago
  32. chihiroasleaf Group Title
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    you have lots of geometry problem @luisz :p

    • one year ago
  33. luisz Group Title
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    ty

    • one year ago
  34. luisz Group Title
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    I know

    • one year ago
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