4) L=12 m ; l= 8 m ; h=2,5 m a) A podea= Lxl= 12x8= 96 m patrati b) A perete 1= lxh= 8x2,5= 20 m patrati sunt doi pereti cu suprafata aceasta. ceilalati doi au: A perete 2= Lxh= 12x2,5= 30 m patrati Suprafata de varuit= 2x20+2x30= 40+60=100 m patrati 100:5= 20 l de var 5) AB=5 dam ; EF= 8 dam ; BC= 2 dam ; DE= 3 dam se imparte figura in doua dreptunghiuri:din C pe AF se duce perpendiculara CM. Aflam: Aria ABCM= BCxAB= 2x5= 10 dam patrati Aria MDEF = EFxDE= 3x8= 24 dam patrati Aria teren= 10+24= 34 dam patrati Perimetrul terenului= AB+BC+CD+DE+EF+AF CD= EF-AB= 8-5= 3 dam AF= BC+DE= 2+3= 5 dam Perimetrul=5+2+3+3+8+5= 26 dam
