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PMC 2013-14 Q5

Autor:Arthur Lee
Thema:Fläche
題目五
紅色與綠色圖形的面積分別是 72 cm2 和 60 cm2，求藍色圖形的面積。 In this figure, area of the red shape = 72 cm2 and area of the green shape = 60 cm2. Find the area of the blue shape.

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