Răspuns :
Sp = 25 m
l = L - 5 => L = l + 5
l + 5 + l = 25 m
2l = 25 - 5
2l = 20 m
l = 20 : 2
l = 10 m
L = 10 + 5
L = 15 m
l = L - 5 => L = l + 5
l + 5 + l = 25 m
2l = 25 - 5
2l = 20 m
l = 20 : 2
l = 10 m
L = 10 + 5
L = 15 m
P/2 =25
25 =L+ l
l =L-5
25=L+L-5
2L =25+5 =30
L =15 m
l =L-5 =15-5 =10 m
25 =L+ l
l =L-5
25=L+L-5
2L =25+5 =30
L =15 m
l =L-5 =15-5 =10 m