Answer:
16 cm, 30 cm, 34 cm
Step-by-step explanation:
I got this answer simply by plugging each number into my calculator with the following equation:

When you the lower numbers into the equation, if the lengths really do give you a triangle, then you should get the largest number as your output. This can help you with any of the other questions that you may have to answer.
the total area will be the sum of the area of the four sides of the shed. In other words it is the curved surface area
If your talking about the graph with x and y. The section that has a higher amount in total would be y. Apologies, if I confused myself on your question.
Expression example: 15x7
equation example: 15x7=105