Surface Area and Nets

The total area of the surface of a three-dimensional object.

Add the areas of all six faces: SA = 2(lw + lh + wh), where l = length, w = width, h = height.

A two-dimensional representation of a three-dimensional figure that can be folded to form the figure.

A cube has 6 faces.

SA = 6s², where s is the length of a side.

SA = base area + lateral area = s² + 2(s * sl), where s is the side length and sl is the slant height.

SA = 2πr² + 2πrh, where r is the radius and h is the height.

A prism has two parallel bases, while a pyramid has one base and triangular faces that meet at a point.

SA = base area + lateral area = (1/2 * base * height) + (perimeter of base * height).

SA = πr² + πrl, where r is the radius and l is the slant height.