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28Tylerr

Find one area of each triangle. Round intermediate values of the nearest tenth. Ust the rounded values to calcuate the next value. Round your final answer to the nearest tenth. Please help and show work! Drawing Below -->!

  • one year ago
  • one year ago

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  1. 28Tylerr
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    |dw:1337137612703:dw|

    • one year ago
  2. GOODMAN
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    Hmm...lol, the drawing is a bit unclear..

    • one year ago
  3. 28Tylerr
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    Lol, I know it's kind of hard to read.

    • one year ago
  4. GOODMAN
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    |dw:1337041518669:dw|

    • one year ago
  5. GOODMAN
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    I dont know where the 2 goes, lol.

    • one year ago
  6. 28Tylerr
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    There was no 2 and it was 5.2

    • one year ago
  7. GOODMAN
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    |dw:1337041626863:dw|

    • one year ago
  8. GOODMAN
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    Like that right?

    • one year ago
  9. 28Tylerr
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    Yepp

    • one year ago
  10. GOODMAN
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    |dw:1337041674389:dw|

    • one year ago
  11. GOODMAN
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    Thers a more clearer version.. As you can see, this looks like an isosceles.

    • one year ago
  12. 28Tylerr
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    Ahh, Yes it kinda looks like a triangle split in two

    • one year ago
  13. GOODMAN
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    Now..because of this one rule..lol, sorry forgot the rule, but remember its function, but it stated that that line in the middle, i think altitude its called, not sure, that separates the triangle, makes the two halves equal.

    • one year ago
  14. GOODMAN
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    So, basically, that means: |dw:1337041876443:dw|

    • one year ago
  15. 28Tylerr
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    Ok, Would I use the a2 + b2 = c2 and the a=1/2bh?

    • one year ago
  16. GOODMAN
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    Yes..I have found all the necessary lengths, all you need to do is plug it in to your formula.

    • one year ago
  17. GOODMAN
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    So.. What is our base?

    • one year ago
  18. 28Tylerr
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    Ok, Would it be like this: 7^2 + 7^2 = 5.2^2?

    • one year ago
  19. GOODMAN
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    No..wait.

    • one year ago
  20. 28Tylerr
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    Or would you add the 2 5.2's to make 10.4?

    • one year ago
  21. GOODMAN
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    |dw:1337042106132:dw|

    • one year ago
  22. GOODMAN
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    Use Pythagorean Theorem. Our hypotenuse, or "c" is 7 our leg 1 or "a" is 5.2 we need to find leg2 or "h"

    • one year ago
  23. 28Tylerr
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    Ok, So how would I set that up?

    • one year ago
  24. GOODMAN
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    \[a ^{2}+b ^{2}=c ^{2}\] \[(5.2)^{2}+b ^{2}=7^{2}\] \[27.04+b ^{2}=49\] \[27.04-Subtract \] \[b ^{2}=49-27.04\] \[b ^{2}=21.96\] \[b=4.7\]

    • one year ago
  25. GOODMAN
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    Our "b" will substitute as our "h" or height.

    • one year ago
  26. GOODMAN
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    |dw:1337042542370:dw|

    • one year ago
  27. GOODMAN
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    So, now we have all the components of our triangle. A=1/2bh A=1/2(10.4)(4.7) A=1/2(48.88) A=24.44

    • one year ago
  28. 28Tylerr
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    Would that be my answer and my answer for my area

    • one year ago
  29. GOODMAN
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    Yes..that would be your area.

    • one year ago
  30. 28Tylerr
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    Mhmmk, can you help me with 1 more like this?

    • one year ago
  31. GOODMAN
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    Okay..but I gotta hurry. I have some trig functions, lol.

    • one year ago
  32. 28Tylerr
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    |dw:1337140075755:dw|

    • one year ago
  33. GOODMAN
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    |dw:1337042863061:dw|

    • one year ago
  34. GOODMAN
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    Like that? Is it isosceles as well?

    • one year ago
  35. 28Tylerr
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    Yes

    • one year ago
  36. GOODMAN
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    Okay, because of the altitude, we can also determine this..|dw:1337042961699:dw|

    • one year ago
  37. 28Tylerr
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    Ok

    • one year ago
  38. GOODMAN
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    Now.. We have our formula. A=1/2bh Our Base: 16 And our height: 5

    • one year ago
  39. 28Tylerr
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    Can you show me some work for that plz on both? (:

    • one year ago
  40. GOODMAN
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    A=1/2bh A=1/2(16)(5) A=1/2(80) A=40

    • one year ago
  41. 28Tylerr
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    What about for a2 + b2 = c2

    • one year ago
  42. GOODMAN
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    We didn't need the Pythagorean Theorem, because we had all the necessary lengths to find the Area.

    • one year ago
  43. 28Tylerr
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    Oh ok so all I needed was the Area because

    • one year ago
  44. 28Tylerr
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    I had all of the lengths

    • one year ago
  45. GOODMAN
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    Yes..but the first one, we needed the height, and we used the Pythagorean Theorem to find it. In this problem, we already had everything we needed to find the Area.

    • one year ago
  46. 28Tylerr
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    Ok, I thank you for all of the help Goodman. Hopefully you can help me some more some other time. Thank You (:

    • one year ago
  47. GOODMAN
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    No Problem :D Iam glad I helped

    • one year ago
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