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Math Help - Quick Test for Pentagram

  1. #1
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    Quick Test for Pentagram

    Hi, I have a data set of lines with slopes and y-intercepts and I need a quick test to see if 5 lines make any type of pentagram (5 lined star)

    The current test I'm using now, sorts the slopes in order, calculates 10 intersection points and checks to see if 5 conditions are true. - please see attached excel sheet for elaboration

    Unfortunately this is proving to be quite slow when I have a lot of combinations to check.

    There's got to be a faster way.

    Any ideas?
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  2. #2
    MHF Contributor

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    Re: Quick Test for Pentagram

    That is a miro-soft "Office" file so only people who have that program can open it.
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