Question

calculati perimetrul unui triunghi ABC care are: a) AB=20 mm , BC=1,2cm , AC=0,1 dm. b) AB=21 cm , BC =1300 cm , AC=0,1 hm. c) AB=0,25 hm , BC=3,10 dam , AC= 12 m. d) AB=2,8 dam , BC=11,5 m , AC=1550 cm. ☺☺ AJUTOR

Answer 1

a) AB=20 mm=2 cm
     BC=1,2cm
     AC=0,1 dm=1 cm
P=2+1,2+1=4,2 cm
b) AB=21 cm =0,21 m
    BC =1300 cm=13 m
    AC=0,1 hm=10 m
P=0,21+13+10=23,21 m
c) AB=0,25 hm =25 m
   BC=3,10 dam =31m    AC= 12 m
P=25+31+12=68 m
d) AB=2,8 dam
    BC=11,5 m =1,15 dam
    AC=1550 cm =1,55 dam
P=2,8+1,15+1,55=5,5 dam