Răspuns :
Intr-un cub sunt 12 muchii
12l=180cm=>l=15cm
a)P=4l=60cm
A=l^2=225cm^2
b)V=l^3=15^3=3375cm^3=3,375dm^3=3,375L
lungimea unei muchii: 180:12=15cm
- perimetrul: 4·15=60cm
aria: 15·15=225cm
- volumul:15·15·15=3375cm cubi
Intr-un cub sunt 12 muchii
12l=180cm=>l=15cm
a)P=4l=60cm
A=l^2=225cm^2
b)V=l^3=15^3=3375cm^3=3,375dm^3=3,375L
lungimea unei muchii: 180:12=15cm
aria: 15·15=225cm