think about it: one bottom, and 4 sides (2 long and 2 short)
you know that area is length * width, so draw the box and label the edges.
Fran wants to cover a retangular box with contact paper. The box is 10cm long, 5cm wide and 5cm high. How much paper will she need to cover all 6 sides?
4 answers
oops bottom and top are the same size.
200cm
Nope:
top and bottom: 10x5x2 = 100
short sides: 5x5x2 = 50
long sides 10x5x2 = 100
sum is 250 cm^2
top and bottom: 10x5x2 = 100
short sides: 5x5x2 = 50
long sides 10x5x2 = 100
sum is 250 cm^2
4 answers