Calculați perimetrul unui dreptunghi cu dimensiunile:

Explicație pas cu pas:
formula este:
[tex]Perimetrul = 2 \times (lungimea + latimea) = 2 \times (L + l)[/tex]
[tex]P = 2 \times (L + l) = 2 \times (18m + 29m) = 2 \times 47m = 94m[/tex]
[tex]P=2 \times (15hm + 12dam) =2x(150 + 17)dam = 2 \times 167dam = 334dam[/tex]
[tex]P = 2 \times (18 cm+21 mm) = 2 \times (180mm + 21mm) = 2 \times 201mm = 402mm[/tex]
[tex]P = 2 \times (18.32dm + 23.15mm) = 2 \times (1832mm + 23.15mm) = 2 \times 1855.15mm = 3710.3mm[/tex]
[tex]P = 2 \times (2500m + 1.5km) = 2 \times (2500m + 1500m) = 2 \times 4000m = 8000m[/tex]
[tex]P = 2 \times (1km + 6.3hm) = 2 \times (10hm + 6.3hm) = 2 \times 16.3hm = 32.6hm[/tex]
Perimetrul este suma tuturor laturilor
P=AB+BC+CD+DA sau P=2(L+l)
a) P=18m+9m+18m+9m
P=54m
c) l=2.1cm
P=18cm+2,1cm+18cm+2,1cm
P=40,2cm
e) l=2,5 km
P=1,5km+2,5km+1,5km+2,5km
P=8km
b) l=1,7hm
P=15hm+1,7hm+15hm+1,7hm
P=33,4 hm
d)l= 0,2315dm
P=18,32dm+0,2315dm+18,32dm+0,2315dm
P=37,283dm
f) l= 10hm
P=6,3+10+6,3+10
P=32,6 hm
Sper ca te-am putut ajuta!!!