Răspuns :
P = a+ b + c
a = 3/2 ·b c = 1/2 ·a = 1/2 ·3/2· b = 3/4b
3/2 ·b + b + 3/4 ·b = 39 |·4
6b + 4b + 3b = 156
13b = 156 b = 12cm a = 18cm c = 9cm
a = 3/2 ·b c = 1/2 ·a = 1/2 ·3/2· b = 3/4b
3/2 ·b + b + 3/4 ·b = 39 |·4
6b + 4b + 3b = 156
13b = 156 b = 12cm a = 18cm c = 9cm
P =L1+L2+L3
L1 =3L2/2 => L2 =2L1/3
L3 =2L1/3
39 =L1+2L1/3+L1/2 NUMITOR 6
234 =6L1+4L1+3L1
13L1 =234
L1 =18 M
L2 =2L1/3 =2*18/3 =36/3 =12 M
L3 =L1/2 =18/2 =9 M
V ; 18+12+8 =39 M
L1 =3L2/2 => L2 =2L1/3
L3 =2L1/3
39 =L1+2L1/3+L1/2 NUMITOR 6
234 =6L1+4L1+3L1
13L1 =234
L1 =18 M
L2 =2L1/3 =2*18/3 =36/3 =12 M
L3 =L1/2 =18/2 =9 M
V ; 18+12+8 =39 M