An object rotated by 180 degrees in a clockwise and counterclockwise can have axis reversed. Hence the image is not the same anymore. However when it is 360 degrees reversed, the image is brought back to its original axis, hence the image is the same again,
You know that $74.92 is the total, and you need to know how much of that total was split between 4 cousins. So that means you have to divide 74.92 by 4. This gives you $18.73.
Hope this helped! ;)
The formula for area of a trapezoid is

so you add up the bottom base (17) and the top base (3) to get 20.
you then take the sum of the bases (20) times the height (8) to get 160.
lastly, you take 160 ÷ 2 to get your final answer, which is 80 (: