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b - x+4
Ob = 32 cm
Ob = 2a+2b
2a+2b = 32 |:2
a+b = 16
x+x+4 = 16
2x = 16-4
2x = 12 |:2
x = 6
a - 6 cm
b - 6+4 = 10 cm
P = a*b
P = 6*10
P = 60 cm²
x;x+4-boki prostokąta
2x+2(x+4)=32 /:2
x+x+4=16
2x=12
x=6 cm
x+4=10 cm
boki:6cm,10 cm
P=6*10=60 cm²
x+4cm-drugi bok
2*x+2*(x+4cm)=32cm
2x+2x+8cm=32cm
4x=32cm-8cm
4x=24cm/:4
x=6cm
a=6cm
b=6cm+4cm=10cm
P=a*b
P=6cm*10cm
P=60cm²
odp.pole prostokąta wynosi 60cm²