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  1. Pythagoras and the ratios : a math adventure /
    Pythagoras and the ratios
    a math adventure
    Book
    由 Ellis, Julie, 1961-
    出版 2010
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  2. What's your angle, Pythagoras? : a math adventure /
    What's your angle Pythagoras?
    a math adventure
    Book
    由 Ellis, Julie, 1961-
    出版 2004
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