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anonymous

  • one year ago

Find the area of the triangle. Round the answer to the nearest tenth. A. 68.4 square units B. 75.3 square units C. 84.5 square units D. 136.7 square units

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  1. anonymous
    • one year ago
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  2. geerky42
    • one year ago
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    Do you know trigonometry?

  3. anonymous
    • one year ago
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    no

  4. anonymous
    • one year ago
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    not really

  5. anonymous
    • one year ago
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    @geerky42 can you help me tho solve using trig thats the category im on

  6. anonymous
    • one year ago
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    "Trigonometric Area Formulas"

  7. geerky42
    • one year ago
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    So there are area formulas you can use? Can you tell me these formulas?

  8. anonymous
    • one year ago
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    they arent any on this question thats what i need

  9. geerky42
    • one year ago
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    Ok let's find height. |dw:1437442631416:dw| Do you know how? HINT: \(\sin\theta = \dfrac{\text{Opp}}{\text{Hyp}}\)

  10. anonymous
    • one year ago
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    what does that symbol next to sin mean

  11. UsukiDoll
    • one year ago
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    theta

  12. geerky42
    • one year ago
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    We have angle \(63^\text o\), so opposite side is h and hypotenuse side is 13.

  13. geerky42
    • one year ago
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    Common way to denote angle.

  14. anonymous
    • one year ago
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    now what

  15. geerky42
    • one year ago
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    Well, plug in values and solve for \(h\).

  16. anonymous
    • one year ago
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    um i got 4.8

  17. geerky42
    • one year ago
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    How?

  18. anonymous
    • one year ago
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    what do i plug in for H

  19. geerky42
    • one year ago
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    Nothing. You are solving for h. \(\sin\theta = \dfrac{Opp}{Hyp}\) You are given that \(\theta = 63^\text o\) and \(Hyp = 13\) You are trying to find height aka opposite side.

  20. anonymous
    • one year ago
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    ok now i got 11.4

  21. anonymous
    • one year ago
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    sin(63)=h/13

  22. geerky42
    • one year ago
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    Yep. Now you have height. However we need base. We have hypotenuse and opposite side, so we can use Pythagorean Theorem here to find adjacent side.

  23. geerky42
    • one year ago
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    |dw:1437443448625:dw|

  24. anonymous
    • one year ago
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    126?

  25. anonymous
    • one year ago
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    A. Refer to the attachment.

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