👤

calculati perimetrul unui dreptunghi ce are dimensiunile(lungimea si latimea)

a)L=15dm,l=6dm
b)L=20m,l=30dm
c)L=2hm,l=90mm


Răspuns :

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