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anonymous

  • one year ago

The figure below shows a triangular wooden frame ABC. The side AD of the frame has rotted and needs to be replaced:

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    What is the length of the wood that is needed to replace AD?

  3. anonymous
    • one year ago
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    @welshfella

  4. welshfella
    • one year ago
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    use trigonometry take the big triangle tan 45 = AB/BC = AB/14 solve for AB

  5. welshfella
    • one year ago
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    then find the length of DB in the bottom triangle tan 30 = DB/14 solve for DB

  6. welshfella
    • one year ago
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    finally AD = AB-DB

  7. anonymous
    • one year ago
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    How do I find out what AB and DB are tho?

  8. welshfella
    • one year ago
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    tan45 = AB / 14 cross multiply:- AB = 14* tan45 grab your calculator and work it out

  9. anonymous
    • one year ago
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    Thank you

  10. welshfella
    • one year ago
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    yw

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