Question

calculati perimetrul unui dreptunghi ce are dimensiunile (lungimea si latimea) egala cu : a) L=15 dm l=6 dm b) L=20 m l=30 dm c) L=2 hm l=15 dam d) L=3,5 dm l= 1,8 dm e) L=14,2 cm l=90 mm f) L=12,5 hm l=1 km

Answer 1

p=2l+2L
p=2*6+2*15=12+30=42dm
p=2*200+2*30=460dm
p=2*20+2*15=70dam
p=2*1,8+2*3,5=10,6dm
p=2*142+2*90=464mm
p=2*10+2*12,5=45hm