Réponse:
BD= 8 dm= 80 cm
AF= 9 cm
EC = 4 dm = 40 cm
Aire(ABD) = (80×9)÷2=360 cm²
Aire(BDC)= (80×40)÷2=1 600 cm²
Aire(ABCD)= 1600+360=1960 cm²
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Réponse:
BD= 8 dm= 80 cm
AF= 9 cm
EC = 4 dm = 40 cm
Aire(ABD) = (80×9)÷2=360 cm²
Aire(BDC)= (80×40)÷2=1 600 cm²
Aire(ABCD)= 1600+360=1960 cm²