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Math Help - [SOLVED] Tangent question

  1. #1
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    [SOLVED] Tangent question

    I'm having a little trouble with this question and don't know where to start.



    If the length of tangent JM is 10 and JP is 4, find PQ.
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  2. #2
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    Try using the Secant-Tangent Theorem.

    (JM)^{2}=JP\cdot{JQ}

    (10)^{2}=4\cdot{JQ}

    \frac{100}{4}=25=JQ

    Therefore, PQ=25-4=21
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  3. #3
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    thanks, i knew there was a formula but couldnt remember which one
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  4. #4
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    Yeah, there's a mess of them. But they sure can be handy to remember. If one didn't know it, it would be tricky trying to figure out.
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