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a1234

  • one year ago

A parallelogram has an angle of 50 degs and sides of 5 and 10 inches. What are the lengths of the diagonals? Round each to the nearest tenth of an inch. Are these 13.7 and 7.8? Not quite sure.

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  1. ChantySquirrel1129**
    • one year ago
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    |dw:1444540380146:dw|

  2. a1234
    • one year ago
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    yes

  3. ChantySquirrel1129**
    • one year ago
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    Okie dokie c: Diagonal is this, right? :|dw:1444540562960:dw|

  4. ChantySquirrel1129**
    • one year ago
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    *diagonals are

  5. a1234
    • one year ago
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    yup

  6. ChantySquirrel1129**
    • one year ago
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    Lol I'm trying to remember doing this stuff :p Show me where you got your answers from please c:

  7. a1234
    • one year ago
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    I did x^2 = 5^2+10^2-2*5*10 cos50° and y^2 = 5^2+10^2-2 * 5*10 cos130°

  8. a1234
    • one year ago
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    law of cosines

  9. ChantySquirrel1129**
    • one year ago
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    You got the 7.8 diagonal right though c:

  10. ChantySquirrel1129**
    • one year ago
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    But the other one, 13.7, you were a bit off :p

  11. a1234
    • one year ago
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    why?

  12. ChantySquirrel1129**
    • one year ago
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    Well I believe the correct answer is 13.76, which would round to 13.8 c:

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