Pc=2ab+2ac+2bc
a)
5mm=0,5cm
a=0,5cm
b=1cm
c=5cm
Pc= 2*0,5*1+2*0,5*5+2*1*5=1+5+10=16cm²
b) 2m=200cm=20dm
a=20dm
b=4dm
c=5dm
Pc= 2*20*4+2*20*5+2*4*5=160+200+40=400dm²
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Pc=2ab+2ac+2bc
a)
5mm=0,5cm
a=0,5cm
b=1cm
c=5cm
Pc= 2*0,5*1+2*0,5*5+2*1*5=1+5+10=16cm²
b) 2m=200cm=20dm
a=20dm
b=4dm
c=5dm
Pc= 2*20*4+2*20*5+2*4*5=160+200+40=400dm²