wzór - (a+b)*h : 2
pierwszy trapez
(10+7) * 3 : 2 = 51 : 2 = 25,5 cm2
drugi trapez
(4+6)*4 : 2 = 40 : 2 = 20 cm2
trzeci trapez
(4+7)*6 : 2 = 66 : 2 = 33 cm2
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wzór - (a+b)*h : 2
pierwszy trapez
(10+7) * 3 : 2 = 51 : 2 = 25,5 cm2
drugi trapez
(4+6)*4 : 2 = 40 : 2 = 20 cm2
trzeci trapez
(4+7)*6 : 2 = 66 : 2 = 33 cm2