Shape A
When you find the area of a parallelogram, you must multiply the height by the base. In this case, the height is 2 and I believe the base would be considered 3 (amount of blocks on chart), so 2 x 3 = 6.
So the area would be 6 (whatever measurement is being involved)^2.
You must always include the ^2 because it refers to inches being squared, or area.
Shape B
You must multiply the base by the height which is 3 x 3 = 9. Then divide by half (its like finding an area of rectangle or square, and dividing in half, like a triangle). So the area is 4.5.
Shape C
The base is 4 and the height is 2 so 8. Then divide by half and is 4, so answer is 4. But can't deny this one is a bit harder to answer so it may be wrong.
^2 must be included in all three subjects since area is involved in all three.