Question

Count the unit squares, and find the surface area of the shape represented by each net. One cube = 1 ft^2

Answer 1

$45\:square\:units$

1) The total surface area of a cube is given by a formula:

$TSA=6s^2$

2) Since the cube in the picture is made up of 3 squares wide and 3 squares in length we can tell the following:

$TSA=6(3)^2=6\times9=45\:u^2$

Note that the area of one of those tiny cubes is 1 ft² because: