Răspuns :
l = 4/5 * L
l = 4/5 * 15
l = 60/5
l = 12 cm
P paralelogram = 2L + 2l
= 30 cm + 24 cm
= 54 cm
l = 4/5 * 15
l = 60/5
l = 12 cm
P paralelogram = 2L + 2l
= 30 cm + 24 cm
= 54 cm