Răspuns :
a.) P= 18 cm
P= 4l
18= 4l
l= 18/4
l= 4,5 cm
b.) P= 2,36 cm
2,36 = 4l
l= 2,36/4
l= 0,59 cm
c.) P= 43,5 cm
43,5 = 4l
l= 43,5/4
l= 10,875 cm
a.) P= 18 cm
P= 4l
18= 4l
l= 18/4
l= 4,5 cm
b.) P= 2,36 cm
2,36 = 4l
l= 2,36/4
l= 0,59 cm
c.) P= 43,5 cm
43,5 = 4l
l= 43,5/4
l= 10,875 cm