Răspunsuri

  • Utilizator Brainly
2014-06-05T14:50:21+03:00
L=20*3=60 cm 
l=20 cm

P=2(L+l)
P=2(60+20)
P=160

A=L*l
A=60*20
A=1200
1 5 1
2014-06-05T14:55:07+03:00
Lungimea=20ori 3=60. Aria=20 ori 60=1200 Perimetrul =(20ori 2)+(60ori 2)=40+120=160