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how do you find the angles of a triangle when...

Discussion in 'The Lounge' started by colbystephens, Oct 11, 2006.

  1. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    you only have the three lengths of the sides? this is not a right triangle.
     
  2. bear76

    bear76 1/2 ton status

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    Depends.
     
  3. colbystephens

    colbystephens 1 ton status GMOTM Winner

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  4. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    on?
     
  5. bear76

    bear76 1/2 ton status

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    If I know it from memory or have to figure it out. Triangle angles = 180* find the ratio of the sides to each other and divide 180* by those ratios. Ratios with 1-1-2 the angles = 45*45*90*. I'm not a teacher, that the best I can explain it.
     
  6. josh86k10

    josh86k10 1/2 ton status

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    Sin(x)=opposite/ hypotenuse
    Cos(x)= adjacent/ hypotenuse
    Tan(x)= opp/adj

    Inverse of the above, when the appropriate lengths for the trig function are entered should give you the value of x.

    sin^-1(opp/hyp)=x
    and so on.

    Right? its been a while since trig.
     
  7. BigBen

    BigBen 1/2 ton status Premium Member

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    Correct.
     
  8. hunterguy86

    hunterguy86 1/2 ton status

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    That would be it. I'm taking this damn class right now. I hate trig...........
     
  9. mofugly13

    mofugly13 1 ton bucket of rust Premium Member

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    Trig only works on right triangles, right?
     
  10. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    trig doesn't only work on right triangles, but the equations posted do only work on right triangles. the only trig function i know that does work on non-right triangles is:

    a/sin(A)=b/sin(B)=c/sin(C).
     
  11. randy88k5

    randy88k5 1/2 ton status

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