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a=2cm
b=4 i 1/2 cm
P=a*b
P=2*4 i 1/2
P=9cm²
b)
a=2,4cm
b=4cm
P=a*b
P=2,4*4
P=9,6cm²
c)
a=12cm
b=2,75cm
P=a*b
P=12*2,75
P=33cm²
P=a*b
P=2*4,5
P=9cm²
b)
P=a*b
P=2,4 *4
P=9,6cm²
c)
P=a*b
P=12*2,75
P=33cm²
b=9,6
c=33