Pic Title: Trapezoidal perimeter, area Related Phrase: Perimeter, area Related pictures: Trapezoidal perimeter, area Source: http://114.tongyi.com/ Pic Description: 　　Keystone Zhou Zhanggong formula - Accor's News trapezoidal Zhou Zhanggong formula _ trapezoid area and perimeter Translated by Google No. / 12 Picture               Slide Show

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