Răspuns:
a) EF: DF+2cm
EF: 6cm+2cm
EF: 8 cm
DE: 8 cm: 2 cm
DE: 4 cm
P: 6cm+8cm+4cm
P: 18cm
b) DF:5cm×2cm
DF:10cm
EF:5cm+2,5cm
EF: 7,5cm
P:5cm+10cm+7,5cm
P:22,5 cm
iar din c nu am inteles nimic
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