The definition for surface area is the number of unit squares needed to cover the surface. Surface area deals with totally different objects then area does and has different formulas too.
Surface Area of a Rectangle: 2lw + 2lh + 2wh
Surface Area of a Prism: 2 x area of base + 2 x height of base
Surface Area of a Cylinder: 2 x pie x radius x height + 2 x pie x radius (squared)
Surface Area of a Pyramid: It is simply the area of the base + the sum of all the areas of all the triangular faces.
Surface Area of a cone: Pie x Radius (squared) + pie x radius x the side
Surface Area of a circle: 4 x pie x radius (squared)
Those are all the formulas for surface area.
:)
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