Yes and area is the total amout inside of the figure.
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Perimeter is the outside length of an object...three-d or not. So, if you want to find out the outisde length of an object/perimeter, you will have to know the measure of one or two sides (depends on a shape) and add it.
The perimeter is the total distance around - width + width+ length + length.
Find the length of all sides then add together.
Assuming the object is shape with opposite sides of equal length then the perimeter would measure 2 * 7 + 2 * 2 =18
The perimeter