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Daca un patrat are perimetrul de 60 cm ,atunci aria sa este...................

Răspuns :

Patrat: Perimetrul=60 cm
latura=60÷4=15
Aria=l^2=15^2
=>Aria=225 cm parrati
Ppatrat=4×l⇔
⇔60=4×l⇔
⇔4×l=60⇔
⇔l=60:4⇔
⇔l=15 cm

Apatrat=l²⇔
⇔Apatrat=15²⇔
⇔Apatrat=225 cm²