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Thread: interesting question

  1. #1
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    interesting question

    ABC is a quadrilateral.
    Angle BAC =60 degrees
    Angle BDC=150 degrees
    |DB|=12
    |DC|=5
    |DA|=x


    interesting question-kasa.png
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  2. #2
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    Re: interesting question

    I solved this question.
    Who can solve this without trigonometry?
    clue:equilateral triangles.
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  3. #3
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    Re: interesting question

    I see no quadrilateral.
    Solve WHAT? I see no question.
    You need another coffee!

    One question for you: what is length of BC?
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  4. #4
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    Re: interesting question

    OK: did you mean ABDC is a quadrilateral?

    Do those funny looking symbols on
    AB and AC mean AB = AC?

    What does the symbol on right of 150 mean?

    If AB = AC and angle BAC = 60,
    why did you not simply state:
    ABC is an equilateral triangle?
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  5. #5
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    Re: interesting question

    Yes AB=AC
    It is 150 degrees.It is degree symbol.
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  6. #6
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    Re: interesting question

    I liked the question and solution. I posted it by this reason. I have the answer and it is fun to solve.
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  7. #7
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    Re: interesting question

    Ad = 13
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  8. #8
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    Re: interesting question

    Yes.
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  9. #9
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    Re: interesting question

    How did you find AD ?
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