1.若点C是线段AB的黄金分割点,AB=14CM.则AC=______2.两个相识多边形最后边分别为35和14,它们的周长差为60,则这两个多边形的周长分别是_________3.两个数的比值是2:4,如果比的前项扩大2倍,后项缩小2

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