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f=8
p = e ^ f /2 = 40/2 = 20 cm2
d1= 5cm
d2= 8cm
Rozw
Prombu = d1 ∙ d2 / 2
P= 5cm*8cm/2 = 40cm² / 2 = 20cm²
Odp: Pole tego rombu wynosi 20cm²
p=(5cmx8cm)/2=40cm²/2=20cm²