Kinda of a combination of both. The surface of a 3-D object is called surface area.
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Total surface area= 1/2 times the perimeter of the base times the slant height plus the area of the base Lateral surface area= 1/2 times the perimeter times the slant height
You can only figure ot the surface area of a cube.
The surface area of a prism is the two bases and all the sides A = 2 *area of base + Perimeter of base * Height of prism.
Area is the number of square unit needed to cover a surface. Perimeter of a figure is the distance around the figure Perimeter is measurements of each sides added.
2*area of triangular faces + perimeter of triangle*length of prism (not prisim).