You plan to paint the outside of this barn, including the roof, but not the floor. Which calculation will help you best decide how much paint you will need?

Lateral surface area of the barn

Step-by-step explanation:

In this case, the area will include the walls making the barn and the roof. It will exclude the floor that is not painted.The area of the walls can be calculated by applying the formula for area of a rectangle or area of a square depending on the dimensions of of the walls. The roof will include area for the rectangular parts and the triangular parts which also will depend on the shape of the roof.

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