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Math Help - similar triangles

  1. #1
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    similar triangles

    In the diagram , BC is parallel to PQ and NA . Show that PQ:BC =NR:NC
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  2. #2
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    You see that:
    triangles NAC and RQC are similar
    triangles ABC and APQ are similar

    hence,
    NC:NR = AC:AQ, and
    BC:PQ = AC:AQ

    therefore
    NC:NR = BC:PQ or
    NR:NC = PQ:BC
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