Răspuns :
2l=!__!__!
2L=!__!__!__!__!__!__!__!__!
P=2l+2L=20
20:10=2-o latime (un segment
2l=2×2
2l=4 cm
2L=2×8=16 cm
P= 16+4=20 cm
L=8,l=8:4=2
2L=!__!__!__!__!__!__!__!__!
P=2l+2L=20
20:10=2-o latime (un segment
2l=2×2
2l=4 cm
2L=2×8=16 cm
P= 16+4=20 cm
L=8,l=8:4=2