Răspunsuri

2014-06-26T18:57:39+03:00
P=85,6
P=2l+2L

l+12,3=L

2l+2(l+12,3)=85,6

2l+2l+24,6=85,6
4l+24,6=85,6

4l=85,6-24,6
4l=61
l=15,25

L=15,25+12,3
L=27,55
19 4 19
2014-06-26T21:14:18+03:00
(L+l)*2=85,6
L=12,3+l
(12,3+l+l)*2=85,6
12,3+2l=85,6:2=42,8cm
2l=42,8-12,3=30,5
l=30,5:2=15,25cm
L=12,3+15,25=27,55cm
13 4 13