1,3 dm = 13 cm
1,7 dm = 17 cm
Pc= 2 • (13 cm • 17 cm + 13 cm • 7 cm + 17 cm • 7 cm) = 2 • (221 cm2 + 91 cm2 + 119 cm2) = 2 • 431 cm2 = 862 cm2
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1,3 dm = 13 cm
1,7 dm = 17 cm
Pc= 2 • (13 cm • 17 cm + 13 cm • 7 cm + 17 cm • 7 cm) = 2 • (221 cm2 + 91 cm2 + 119 cm2) = 2 • 431 cm2 = 862 cm2