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anonymous

  • 5 years ago

solve the triangle a=13,b=7,c=15

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  1. anonymous
    • 5 years ago
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    Define 'solve'

  2. anonymous
    • 5 years ago
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    Yea, what do you need to do?

  3. anonymous
    • 5 years ago
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    i think they want the angles on the inside

  4. anonymous
    • 5 years ago
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    Cosine rule.

  5. anonymous
    • 5 years ago
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    how do i use it if theres no given angle

  6. anonymous
    • 5 years ago
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    You use the cosine rule to find the angle...

  7. anonymous
    • 5 years ago
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    ohh ok i see it my bad lol

  8. anonymous
    • 5 years ago
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    Note the largest angle will be opposite the longest side.

  9. anonymous
    • 5 years ago
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    Law of cosines..15^2=(7^2)+(13^2)-(2*7*13cos(a))....solve for a and that gives you the angle corresponding the the side 15. Then you can either do that for the other side as well of use the law of sines to find the another angle. Once you find a second angle. you can use the fact that the interior angles in a triangle sum to 180 degrees to find the third.

  10. anonymous
    • 5 years ago
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    Hey linalg, are you good with linear algebra, guessin by your username?

  11. anonymous
    • 5 years ago
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    thanks guys youve help me out big time!! :)

  12. anonymous
    • 5 years ago
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    meganchiu..I'm ok with linear. That's the name I created when I first made an account because I had a question involving linear algebra; I was taking that class then..rocc0, you're welcome.

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spraguer (Moderator)
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