Answer:
a. 5
b. 12
Step-by-step explanation:
Using the figures and the number of cubes used to build each one, we can see that the first figure (a) has a single row of three cubes with two additional cubes on each side, this is a total of 5 cubes, or a volume of 5 centimeter cubes. The second figure (b) has a face of two rows of three cubes or three columns of two cubes - either way 3 x 2 = 6 as well as an additional two rows of three cubes or three columns of two cubes behind those - 3 x 2 = 6. Adding the front and back: 6 + 6 = 12 centimeter cubes.
