Question

calculati aria si perimetrul unui dreptunghi cu : a) L=18,3 cm
l=3
b) L=21,75 cm
l=L:5
c)l=9,2 cm
L=l×3

Answer 1

a)Perimetrul= 18,3x2 + 3x2=36,6+6=42,6 cm

Aria= 18,3x 3=54,9 cm

B) Perimetrul= 21,75x2+4,35x2=43,50+8,70=52,20cm

Aria= 21,75x4,35=94,61cm

c) Perimetrul= 9,2x2 +27,60x2= 18,40+55,20=73.40cm

Aria= 9,2x27,60= 253,92