Răspuns :
2L+2l=200⇒L+l=100
L=3l
3l+l=100
4l=100
l=100:4
l=25
L=3*25
L=75
S=L*l
S=25*75=1875
2,5+75=77,5
P=25*2+77,5*2=50+155=205
L=3l
3l+l=100
4l=100
l=100:4
l=25
L=3*25
L=75
S=L*l
S=25*75=1875
2,5+75=77,5
P=25*2+77,5*2=50+155=205
P = 2(L + l)
L = l + 40
400 = 2 (l + 40 + l) | :2
200 = 2 l + 40 | :2
100 = l + 20
l = 100 - 20
l = 80m
L = 80 + 40
L = 120 m
a)
l = 80 + 3
l = 83 m
L = 120 + 3
L = 123 m
P = 2(123 + 83)
Ppistei = 412 m
b)
A = 120 * 80
Ateren = 9600 m²
A = 123 * 83
Apistei = 10209 m²
L = l + 40
400 = 2 (l + 40 + l) | :2
200 = 2 l + 40 | :2
100 = l + 20
l = 100 - 20
l = 80m
L = 80 + 40
L = 120 m
a)
l = 80 + 3
l = 83 m
L = 120 + 3
L = 123 m
P = 2(123 + 83)
Ppistei = 412 m
b)
A = 120 * 80
Ateren = 9600 m²
A = 123 * 83
Apistei = 10209 m²