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Math Help - Ratio problem

  1. #1
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    Ratio problem

    The measure of two supplementary angles are in a ratio 3:15. What are the measures of the angles? And can you explain what method you used to do this because at the moment i got 1/5=? I don't know what to plug in on the other side along with an x to evaluate this.
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  2. #2
    Math Engineering Student
    Krizalid's Avatar
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    Let \alpha,\,\beta be the angles. So \alpha=k,\,\beta=5k. ( k is a positive constant.) Besides, you know that \alpha+\beta=180^\circ.

    Go on from there.
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  3. #3
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    wow im dumb cant believe i never thought of that. thanks
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