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【OG20-P170-156题】
Figures X and Y above show how eight identical triangular pieces of cardboard were used to form a square and a rectangle, respectively. What is the ratio of the perimeter of X to the perimeter of Y?
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题目:图形X和Y是由8个完全相同的三角形纸板组成的,其中X是正方形,Y是矩形。问X和Y的周长比值是多少
解:在正方形X中,由正方形性质定理可得两条对角线互相垂直相等且平分,推出构成它的三角形纸板为等腰直角三角形,假设其腰长为1,则其底长为2开根号,因此正方形周长为4(2开根号),矩形周长为6,比值为4(2开根号):6=2(2开根号):3
题目讨论 (2条评论)

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emily666
周长比
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0 回复 2020-04-27 13:37:31
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贾思敏回复emily666
我以为是边长比,好气哦
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0 回复 2021-08-22 22:22:15
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emily666
右边6条边。。。
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0 回复 2020-03-12 13:43:16