Răspuns :
P= 2(L+l)
L= 7 dam + l => L= 70 +l
560=2(70 +l+l)
560=2(70+2l)
560=140 +4l
560-140=4l
420=4l
l=105 m
L=70 +105 = 175 m
L= 7 dam + l => L= 70 +l
560=2(70 +l+l)
560=2(70+2l)
560=140 +4l
560-140=4l
420=4l
l=105 m
L=70 +105 = 175 m
P= 560
7 dam = 70 m
L = l + 70 m
l I__I
L I__I70
560 - 70 = 490
2p= 490
1p= 245
l = 245 x 1 = 245
L= 245 + 70 = 315
7 dam = 70 m
L = l + 70 m
l I__I
L I__I70
560 - 70 = 490
2p= 490
1p= 245
l = 245 x 1 = 245
L= 245 + 70 = 315