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anonymous

  • one year ago

NEED HELP ASAP The perimeter of an equilateral triangle is 12 feet. Find the area of the triangle. 8√3 8 4√3

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  1. anonymous
    • one year ago
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    If it is equilateral, it means it has the same sides. How many sides are there in a triangle?

  2. anonymous
    • one year ago
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    |dw:1438134600087:dw| How many sides are there in a triangle?

  3. anonymous
    • one year ago
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    Are you there or do you just want the answer?

  4. anonymous
    • one year ago
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    3 sides in a triangle

  5. anonymous
    • one year ago
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    Good! So the whole triangle is 12. Now, divide 12 by 3. What is\[12\div3=?\]

  6. anonymous
    • one year ago
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    4

  7. anonymous
    • one year ago
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    Okay so all sides are 4.|dw:1438134827253:dw|

  8. anonymous
    • one year ago
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    What is the formula for the area of a triangle?

  9. anonymous
    • one year ago
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    yes. but how do i find the area?

  10. anonymous
    • one year ago
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    bh/2

  11. anonymous
    • one year ago
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    It is bh/2.

  12. anonymous
    • one year ago
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    |dw:1438134925446:dw|

  13. anonymous
    • one year ago
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    Notice that we don't know the height. So we will use the Pythagorean Theorem. Are you familiar with that?

  14. anonymous
    • one year ago
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    okay. so the of the triangle would be \[2\sqrt{3}\]

  15. anonymous
    • one year ago
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    height

  16. anonymous
    • one year ago
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    How did you get that?

  17. anonymous
    • one year ago
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    pythagorean theorem

  18. anonymous
    • one year ago
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    Can you show me how?

  19. anonymous
    • one year ago
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    Nevermind.

  20. anonymous
    • one year ago
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    We will take longer. x_x

  21. anonymous
    • one year ago
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    |dw:1438135119198:dw|

  22. anonymous
    • one year ago
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    i know its a bit sloppy

  23. anonymous
    • one year ago
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    So the equation will be.|dw:1438135187194:dw|

  24. anonymous
    • one year ago
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    so the answer is \[4\sqrt{3}\]

  25. anonymous
    • one year ago
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    right?

  26. anonymous
    • one year ago
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    Yes! Good job!

  27. anonymous
    • one year ago
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    thank you so much

  28. anonymous
    • one year ago
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    YOU did it yourself. :D

  29. anonymous
    • one year ago
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    so how would i do it with a 30 60 90 triangle? @mathway

  30. anonymous
    • one year ago
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    |dw:1438135520158:dw|

  31. anonymous
    • one year ago
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    Are you familiar with the 30-60-90 special angle?

  32. anonymous
    • one year ago
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    yes

  33. anonymous
    • one year ago
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    Wait are you finding the area for the 30-60-90 triangle?

  34. anonymous
    • one year ago
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    yes

  35. anonymous
    • one year ago
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    Use the Pythagorean Theorem.

  36. anonymous
    • one year ago
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    and the its still bh/2

  37. anonymous
    • one year ago
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    The area of the triangle we a while ago was a 30-60-90 triangle. :D

  38. anonymous
    • one year ago
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    okay thanks

  39. anonymous
    • one year ago
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    Can I see the problem?

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