Răspunsuri

2014-05-08T20:44:29+03:00
A.P=2(L+l)=2(15+6)=2*21=42dm
b.P=2(20+30)=2*50=100dm
c.L=2hm=20000cm
   l=9cm
P=2(20000+9)=2*20009=40018cm